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Abigail "Abby" Griffin is a major character in the first and second seasons of The 100. She is portrayed by starring cast member Paige Turco, and debuts in the season premiere.

Abby is the Chief Medical Officer and a former member of the Council on the Ark, and an integral part of the execution of the plan to send one hundred juvenile criminals to Earth to test its survivability, and buy citizens of the Ark more time. Upon arriving on Earth, she was made Chancellor of their new settlement.

Life on the Ark
Not much is known about Abby's early life, only that she was born on the Ark and at some point married Jake Griffin and gave birth to her daughter, Clarke. She was made Chief Medical Officer and a member of the Council on the Ark prior to the hundred being sent to Earth.

Due to her position on the council, and her own personal beliefs, when a fatal flaw was discovered by Jake regarding the engineering of the oxygen levels, she told him, against his own wishes, not to go public with the information. Doing what she believed was best, she told the Chancellor, Thelonious Jaha, hoping he would talk her husband out of his plan. Instead, however, Jaha arrested Jake and had him floated immediately. Abby's daughter, Clarke, was put into the Sky Box for her part in the plot, leaving Abby alone. To preserve her relationship with her daughter, she never attempted to correct Clarke's belief that it was her then-best friend, Wells Jaha's, fault that Jake was floated.

Abby was part of the organization and inception of the program that sent the hundred, including Clarke, down to Earth. She played a major role as medical officer, using her knowledge of the children's health to determine whether the Earth was still toxic. By giving each child a wristband, the Ark, and Abby, were able to monitor their vital signs.

At first, she was unable to make sense of the readings, and fellow council member Marcus Kane used the deaths of some of the children to perpetuate the belief that the Earth was still radioactive, and killing the children. Abby refused to believe that she sent her daughter down there to die, though it wasn't until Raven Reyes, an engineer whose boyfriend had been sent to Earth, snuck in and posited the theory that the children were simply taking off their wristbands.

Throughout the series
On the Ark, Marcus Kane informs everyone the 100 have landed but communications are down. It is only thanks to Abby’s wristbands that they know what is happening on Earth. Abby informs Kane that so far they have two dead kids; they show as dark tiles. Abby and Jackson theorize the two were killed on impact, because they went black at the same time they lost communication. Kane deduces if it was radiation that killed them, there would be more fatalities showing up already. Kane is curious about what Abby thinks all of the red means. Abby explains it as either injuries sustained in the landing or they are excited to be there. Later, Callie Cartwig asks Abby how Clarke is doing. Abby replies Clarke’s vital signs are strong but her blood sugar is low. The phone rings and Abby rushes to leave, informing Callie and Kane that the Chancellor has been shot.

Abby and Jackson operate on the Chancellor. During the operation the Chancellor begins to awaken. Abby orders the nurse to increase the anesthesia. The nurse is hesitant, however, and Jackson notes that they have used too much blood and anesthesia and is worried about breaking the law. Abby tells him the Chancellor is dying and increases the anesthesia, herself.

Abby enters Earth Monitoring Station as Callie approaches and asks how the Chancellor is doing. Abby tells her she hopes he makes it through the night and asks if they have lost any more Delinquents. She is told John Murphy and John Mbege have gone dark and Kane tells her it did not happen during the landing. Abby says it is not radiation because that is not how radiation presents. Kane says it could be if there was enough of it but Abby says if there was that much, all of the Delinquents would be dead. Later, Abby mentions ten more tiles have gone dark. Jackson tells her to look at plasma osmolarity going up across the board and Abby realizes the Delinquents found water. Commander Shumway enters with Kane and publicly arrests Abby for "exceeding the maximum medical supplies allowed per patient." Abby tells Kane that breaking the law to keep him from becoming Chancellor was worth it. Kane, as Chancellor Pro Tempore, finds her guilty. Abby brings up the fact that he pressed charges against her husband and daughter and now this and that he is hiding behind the law. Kane sentences her to death and sets the execution for the next morning. He tells her he does it to ensure the human race survives. Abby tells him that is the difference between them, she wants to make sure the human race deserves to survive. Kane has her locked in Clarke's old prison cell where she sees all of the drawings Clarke had made over her year in solitude and cries.

Abby stares out a window into space as a guard opens her door and tells her it is time. She is led to an airlock where Commander Shumway and Kane wait. Callie hugs her goodbye and Abby walks into the airlock with Shumway sealing it behind her. Abby tells Jackson to talk with Sinclair in engineering about figuring out how to reverse-engineer the wristbands to communicate with the Delinquents. Kane gives the nod to Shumway to float Abby but is told to stop by Chancellor Jaha who has awoken from his surgery. He pardons Abby and tells Kane he will deal with him later. Shumway opens the door and Abby walks out of the airlock and orders Jaha back to bed before she leaves with Callie.

In Earth Skills, Jackson tells Abby that rumors are going around about the Delinquents' drop ship launch. He reports that 23 Delinquents' tiles have gone dark with spiking vitals prior. Abby says there is another explanation. Jaha walks in and sees Wells' dark tile. Marcus Kane tells Jaha that the wristbands are telling them the Earth is not survivable. Abby asks Jaha to trust her because for all they know, the kids are fine.

Later, Abby is checking Jaha's injuries and asks for his stance on Kane's Population Reduction Plan. If they do not act to reduce the population on the Ark, everyone will be dead within four months from lack of oxygen. Abby tells him they need to give more time to the Delinquents on the ground. Jaha tells her she has no proof and hope isn't enough when the end of the human race is at stake. Abby leaves as Kane enters and Jaha confronts him about almost floating Abby.

On their way into the mess hall, Jackson tells Abby that Kane is lobbying for votes and she should, too. Raven Reyes comes up and asks Abby about the quarantine in lockup and how she saw open ducts. Abby explains the virus isn't airborne and Raven confronts her about The Council hiding something. Later, Jackson and Abby are going over the data from the wristbands when Abby catches Raven eavesdropping from the air ducts. Raven tells them the Delinquents aren't dying; they're taking off their wristbands because they were told not to. Abby goes to speak before The Council and tells them the kids are taking off their wristbands by choice. They ask how that explains Wells' dark tile and Abby tells them the point is the kids need more time. Kane tells her they do not have time because engineering needs six months to fix the oxygen problem when they will be out of oxygen in four months. Every day they delay the culling, 10 more people will need to be sacrificed. Today, it is 209 and they need to vote now. The vote is split 3-to-3 with the Chancellor to break the tie. Jaha talks about how they were supposed to be a transitional generation but now they will be the generation who either returns to Earth or dies out. He still has hope so he will abstain from voting, ending the vote in a tie to be taken up in ten days. He tells Abby she has ten days to get proof.

Raven is called into a level of the Ark that is considered off-limits. Abby tells Raven that the Ark is dying and Abby has ten days to prove the Earth is survivable before they reduce the population by 320 people. Abby reveals a 130-year-old escape pod and tells Raven to get it ready in nine days. Raven tells her she can do it but she is going Earth with her.

In Earth Kills, in a flashback to a year ago on The Ark, Clarke and her father, Jake Griffin, are watching a soccer match from 2001 on a projection along with Wells and his father, Chancellor Jaha. They joke with each other about the predictable outcome of a game that happened 147 years prior as Abby returns home. She tells Jake that the Systems Analysis he asked for is ready. Jake checks his watch and excuses himself.

Later, Abby asks Jake how his discussion with Jaha went. Jake tells her it is definitive that the Ark only has a year or two of oxygen left. He can't fix it because it is a system failure and the people have a right to know. Abby tells him he can't let people know because they will panic and asks him to promise her that he will obey the Council's orders and keep it quiet, at the very least for Clarke. Abby warns Jake that if he doesn't, he'll get floated while Clarke eavesdrop on the conversation.

Jake is saying goodbye to Abby prior to being floated for trying to tell the people the truth about the oxygen shortage. Abby tells him that Earth is their only chance. He hands her his wedding ring and is about to give her his watch for Clarke when Clarke runs in and they hug. He hands Clarke his watch and tells her to keep it for him. Jaha tells him it is time and Jake tells Clarke he loves her as he walks through the airlock. Clarke says, "I love you," back as they close the airlock and Jake is floated. Clarke collapses into her mother's arms crying inconsolably.

In Murphy's Law, at The Camp, Clarke tells Finn how Wells let her hate him so she would not hate her own mother for killing her father and decides to make Abby feel what she is feeling. Up in The Ark, an alarm sounds in Earth Monitoring Station and Abby sees that Clarke's tile has gone dark. Jackson tries calming Abby as she tries to rationalize why Clarke's wristband would be terminated and asks Jackson for a record of Clarke's vital signs.

Later, Kane stops Abby and asks her if she is heading to mecha station and asks why she has been down there nine times in the past week. He invites himself along but Abby tells him he will have to be inoculated because a mechanic came down with strep and she doesn't want another outbreak. Kane declines and asks her to keep him informed. Abby leaves to meet with Raven at the drop ship she is refurbishing. Raven tells Abby there's a delay with the ship because she needs a pressure regulator before they can launch. Abby tells Raven that Clarke's wristband went out and Raven tells her she will get a pressure regulator that day. Raven leaves for the mess hall to speak with Nygel, the woman in charge of black market operations on board the Ark. Raven asks for a pressure regulator and Nygel tells Raven that she will need to sleep with the Chief of Electrical in order to get the part. Raven tells Nygel to float herself and Nygel tells Raven that her mother took that deal...many times, causing Raven to get irate and be carried out by Nygel's workers.

Raven is waiting in a long line for Medical. She approaches Abby and coughs discreetly and Abby does a cursory medical check on her before pulling her away into private consult, explaining the long line is due to oxygen deprivation. Raven tells Abby that Nygel would not give her the pressure regulator and Abby tells Raven she can get the part from Nygel. Later, Abby approaches Nygel in the mess hall and slips Nygel some morphine for the pressure regulator. Back at the refurbished drop ship, Abby hands Raven a pressure regulator and Raven tells her it might take a few hours to install it. A few hours later, Abby is pacing around while Raven works on the drop ship. Jackson comes in on Abby's telecommunication device and asks if she stole morphine. He tells her that Kane is on his way to arrest both her. Abby can't believe that Nygel turned her in and asks Raven how much longer. Raven tells her twenty minutes and Abby says that Kane will be there in five. She tells Raven that no matter what, she needs to launch the pod, with or without her, and radio back if she makes it or 300 people will die. Abby asks Raven to tell Clarke she loves her.

Raven gets the pressure regulator hooked up as Kane heads toward Mecha Station to arrest Abby. Raven realizes the pressure regulator is broken just as Kane approaches Abby who was waiting for him in the hallway. Abby tells him she did it for her daughter and she still believes the Delinquents are alive. Kane asks Abby what the pressure regulator is for and if there was even a staph infection. Raven dresses in a spacesuit since the pressure in the drop ship won't be regulated and begins the launch sequence for the pod. As Kane is having Abby arrested, Raven launches the drop ship and begins her descent to Earth. Abby tells Kane they have to know the truth.

In Twilight's Last Gleaming, Abby is still in Lockup when Jaha comes to visit her to tell her that they're reaching critical oxygen shortage levels within the Ark. The Council has granted Abby temporary work-release because so many of the Sky People are suffering from pulmonary toxicity. Jaha tells Abby that the Council approved Kane's population reduction plan and they start The Culling of 320 people in twelve hours. Abby asks about Raven Reyes and Jaha tells her that she will probably die like all of the others. Abby goes to work in medical, doing a vision check on nine-year-old Reese Lemkin. She has lost all vision in her left eye due to chronic oxygen deprivation. Reese's father, Tor Lemkin tries to put her hair back from her face with a barrette but she jokingly brushes him off before going outside to wait. Abby explains to Tor that the decline in her vision has been accelerating the last few days and Tor wants to know if they'll fix the air problem soon because his daughter should not have to deal with going blind and he leaves. Jackson comes up and asks Abby if she is all right. She tells him to listen to the radio because that is the only way they will be able to help everyone on the Ark.

Later, Abby confronts Jaha and asks him if it is true that he is going to die in Section 17 and leave the Chancellorship in the hands of Kane. Abby tells him that it is happening too fast and they have other options and possibilities left to try first. She tells Jaha he is a coward and he is running away before she leaves him. She goes to her quarters and removes a memory stick with Jake Griffin's message to the people of the Ark about the oxygen shortage that he was floated the year before for trying to broadcast. She broadcasts an Ark-wide message of Jake's video telling the people about the oxygen shortage. Commander Shumway alerts Kane and he goes after Abby. Jaha watches the message as Jake tells the people that they need to come together and face the crisis. After his message, Abby comes on and tells the Ark that her husband was killed trying to deliver that message and now, in twelve hours, 320 people will be sacrificed. Kane arrives where Abby is and the guards pry the door open. Jaha yells at Abby that she has made an impossible situation worse. Kane warns them there are 400 people gathered outside. A man tells Jaha that the crowd outside has sent an emissary to speak with Abby. Tor Lemkin enters and tells Abby he saw the video and he wants to "volunteer" for Section 17 because his daughter is going blind and he can help prevent that from happening. More Sky People follow, each one volunteering for a spot in Section 17 to give their loved ones extra air. Jaha admits to Abby that Jake was right: it would bring out the best in them.

Tor says goodbye to his daughter, Reese, lying to her about working a double-shift. He tries again to pull her hair out of her face with a barrette and she tells him to stop. They kiss and hug goodbye and he watches her walk away with tears in his eyes. As the volunteers file into Section 17, Kane tells Abby he reminded Jaha that changing to a new Chancellor would be destabilizing. He also tells her he left two men monitoring the radio in case Raven calls in. Abby thanks him as they watch Tor enter Section 17. Jaha thanks Tor for his sacrifice and Tor tells him do not thank him because he's doing it for his daughter. Tor and 319 other Sky People all enter Section 17. Tor holds onto his daughter's barrette as Sinclair reports to Jaha that all hatches and vents have been sealed in Section 17 and asks for the order. Jaha instead walks over to Sinclair's station and presses the button himself, terminating the airflow into Section 17. The people in Section 17 begin to fall asleep as the air supply is cut off. Tor plays with Reese's barrette as Jaha gives a eulogy for them. Tor eventually falls asleep, dropping the barrette. Later, Abby and Jackson enter Section 17 where the 320 bodies are piled where they fell asleep. They start to remove the corpses and Abby picks up Reese's barrette from where Tor had dropped it.

Later that night, Jaha visits Abby in lockup and passes her a flask as he tells her they make the best choices that they can and hope for forgiveness. She asks if they even deserve to be forgiven. Suddenly, Abby and Jaha see the rocket flares from the Delinquents through the window.

In His Sister's Keeper, Raven and Clarke talk about their mothers with Raven tells Clarke that Abby was the one who came up with the idea of fixing the escape pod.

In Contents Under Pressure, Abby stands before The Council and is told that even though she broke laws and should be floated, they need her medical expertise too badly so she has received a stay of execution. Then suddenly they hear Raven calling over the Ark-wide channel, asking for help from the ground. Sinclair boosts the signal and Abby is able to talk to Clarke for the first time. Clarke asks for help with Finn and tells Jaha that Wells did not make it. Sinclair patches Clarke through to medical so Abby and Jackson can help Clarke with Finn's stab wound. The storm, however, temporarily disrupts communications. Abby is able to get back on the radio and Clarke describes Finn's injury to her. Abby guides Clarke through removing the blade from Finn's side. As Clarke is doing so, the storm gets worse and debris hits the drop ship, knocking everyone down, including Clarke and Finn. Luckily, the blade was removed without doing further damage. Clarke finishes stitching up Finn's wound and realizes he is feverish. Abby wants to talk with Clarke but she leaves for the third level. Later, Abby comes back on the radio and Clarke tells her she knows about her mother's involvement with her father's death.

In Day Trip, Jaha tries to get Clarke to forgive her mother for getting her father killed, however, Clarke refuses to speak with her mother.

In Unity Day, Chancellor Jaha gives a Unity Day Celebration speech on The Ark about how everyone will be on the ground next year. He tells that the first Exodus ship will be sent down to earth in 60 hours with reinforcements. Everyone claps and Diana Sydney approaches Abby to ask if there are any hard feelings about her taking Abby's Council seat. Jaha cuts his speech short to begin the Unity Day pageant and Diana remarks on it to Abby before leaving. Jaha introduces the children who will be performing "The Story of Us." A girl in the pageant begins reciting how long ago, 12 Stations were floating alone when they decided to join together. Suddenly, an explosion blasts through the room. Arkers are lying unconscious and dead and people are scrambling to help. Abby asks if Jaha is okay and Jaha tells Kane to find out who did this. Kane finds his mother dying, impaled with with a shard of metal. Abby comes over to help, but there isn't anything she can do. Kane realizes that four members of The Council are dead, telling Jaha that it was a coup and they need to get him out of there. They realize that Diana is missing and Jaha orders a lock-down while Kane goes looking for Diana.

Abby goes to the Exodus ship and begins packing first-aid supplies. She tells Kane she is sorry about his mother. Diana comes running up and tells them they need to delay the launch because a mechanic, Cuyler Ridley, is the terrorist who planted the bomb because his wife died in The Culling and he has turned himself in. Kane questions Diana on why she left the pageant early and she tells him she was lucky. Kane leaves to question Ridley. Later, Abby is still packing the medical supplies while talking to Red, a mechanic, when Diana and her people take over the drop ship. Red makes a run for it back to the Ark and Diana tells them to let him go because she is going to lead everyone else home. Jaha and Sinclair arrive and help Red try to get the door open to the Service bay to prevent them from launching the drop ship. Ridley finds Abby hiding in the bay and brings her to Diana. Diana asks Abby to come with them because they need a doctor and Abby owes no loyalty to Jaha, the man who floated her husband and she'd be able to see Clarke again. Instead, Abby runs and tries to open the door for Jaha and is baton-shocked by one of Diana's guards but the door opens wide enough for Red to get a pry-bar in. They start trying to jack the door open when Sinclair realizes they haven't decoupled the drop ship from the Ark, meaning that all of the systems on the Ark will be crippled and everyone will die if the drop ship launches. Jaha begs Diana not do this and Diana tells everyone the truth: there aren't enough drop ships to get everyone to the ground. Red tells Jaha he doesn't trust either of them but he's going to the ground. He climbs through the door to the drop ship and knocks the jack loose, sealing to door so the drop ship can launch. The drop ship yanks away from the Ark, causing the power to go out and catastrophic damage across the Ark. At The Camp on Earth, there is a sonic boom and Clarke and Bellamy look up to see the Exodus ship coming down a day early, much too fast, and without a parachute. An explosion is seen in the distance and Clarke crumples to the ground in grief when she realizes her mom just died.

In I Am Become Death, Clarke, Raven, and several other Delinquents investigate the Exodus drop ship crash but there are no survivors. Later, Raven tells Clarke she still hasn't been able to get back in contact with The Ark since the Unity Day Celebration and she has a bad feeling. She also tells Clarke she's sorry about her mom dying.

In The Calm, after the Exodus ship caused system-wide failure on the Ark, Sinclair discovers the service hatch was manually sealed before the launch of the Exodus ship, meaning there are survivors still in the service bay. Kane decides to go after them by going through a overheated maintenance shaft. He climbs through and sees people lying on the other side of the door in the service bay. He uses a battery Wick gave him to open the door and rushes inside, waking everyone up. He finds Abby curled in a corner and tells her to wake up as she opens her eyes.

In We Are Grounders (Part 1), Jaha is speaking with The Council and the Station Representatives, telling them that there is no way for anyone to get to the Earth. He says the Delinquents are their final hope and everyone should find peace within themselves in their final hours. He releases all resources to the people and told them that there would be no more rationing. Abby tells Jaha she needs to help a patient injured in the Exodus ship disaster and leaves. Abby and Jackson start working on an injured girl who looks a lot like Clarke. Jackson tells her they should have left her alone because they'll all be dead in two days anyway. The girl begins to convulse and Abby gives her a shot of epinephrine. When she asks Jackson for more epinephrine, he tells her they are all out and Abby has to let her patient go. Abby tells Jackson that Clarke blames her for her father's death and she'll never get to hug her again or protect her any more. Jackson tells her that Clarke is strong-willed like her mother and that is what will keep her alive on the ground. They hug and she tells him to leave before she starts crying over the dead patient.

Later, Kane is running through simulations with Sinclair as he tries to find a way to save some of their people. Jaha enters and asks if they've tried not saving the Ark yet. He suggests they use the thrusters to propel the Ark into the atmosphere and tells Sinclair to find the 5% of the Ark that would survive. He asks Abby if she is ready to see her daughter again. In We Are Grounders (Part 2), on The Ark, Sinclair informs Jaha, Kane, Abby and the other inhabitants of the Ark about the workings and possible consequences of bringing the Ark to Earth, explaining that some parts of the Ark will be destroyed when entering the atmosphere along with the people inside. Jaha tells the Station Representatives that they have no other choice if they do not want them all to die. Once everyone is strapped into different Stations on the Ark, Jaha gives the Traveler's Blessing across the PA system and tells Sinclair to begin their journey back to Earth. Sinclair tries to remotely separate the Ark’s stations from GoSci and the Earth Monitoring Station with explosives so they can use the Ark’s thrusters to blast them towards Earth, but the remote detonation fails. Sinclair informs Jaha that someone will have to manually detonate the bombs thus, someone must stay behind. Kane volunteers and is ready to leave. Abby asks how much air Kane will have and Sinclair tells her that Kane will have one week, two weeks at most. Suddenly, the bombs explode, shaking the Ark. Jaha tells Abby from Earth Monitoring Station that she will see her daughter soon. The Ark’s stations separate from GoSci and head for Earth as the thrusters activate.

Up in space in the remnants of the Ark, Jaha attempts to contact any surviving stations and is able to reach Abby on Mecha Station who was with Kane and Sinclair. She tells him they landed successfully and goes outside and describes what she sees to an emotional Jaha. Kane joins her outside and they see smoke in the distance in the mountains. Abby thinks it may be one of the other stations and Jaha advises that they check it out.

In The 48, Abby is reunited with the other Ark citizens on the ground. She finds Raven in the dropship and asks her how she got hurt, and Raven tells Abby that she was shot. Abby proceeds to ask where Clarke is, but Raven says that Clarke wasn't with her and that she is gone. Abby, along with the others, go to Camp Jaha.

In Inclement Weather, Abby orders a search team to go out and look for survivors. Abby performs Raven's surgery, but tells her risk involved before she begins. Later, Kane and Abby talk about Raven and Bellamy, and Abby realizes that Kane never sent out the search team she asked him to send out, and is angered by that. Later, Abby breaks the news to Raven that she has nerve damage to her leg due to the damage from the bullet and because of that, she won't be able to use one of her legs. At night, Abby, along with Miller's dad, give guns to a group of Delinquents and allow them to go search for their friends.

In Reapercussions, Abby admits to Kane that she has committed a crime by sending armed Delinquents to search for their friends. At first, Kane doesn't want Abby punished, but Major Byrne successfully convinces him that it must be done to maintain order amongst the people. So, Kane orders Abby to be shock lashed ten times. After that, he comes to see Abby and she admits that he can shock lash her a hundred times, but she still doesn't regret what she did. Kane proceeds to ask her to be the Chancellor, to which she accepts.

In Human Trials, Abby is reunited with Clarke. Clarke is surprised and happy to see that Abby became the Chancellor, and she tells her mother about Mount Weather. Abby doesn't allow her or any other of the Delinquents to leave Camp Jaha to go find Finn and Murphy. However, Clarke goes against her mother's wishes and leaves with Octavia and Bellamy. Abigail suspects Raven had something to do with their escape plan, which she did, and interrogates her. Abigail becomes frustrated with Raven and slaps her across the face, which she immediately regrets. She explains that Clarke is still just a kid, but Raven argues that Clarke stopped being a kid the day Abby sent her down to Earth to die.

In Fog of War, two days after Finn's massacre at Lincoln's village, Raven Reyes reveals to Clarke she figured out why they had not heard from any of the other Stations: Mount Weather has been jamming their signals. Major Byrne over hears the conversation and tells Abby about it. Later, while Raven is explaining to Clarke how Mount Weather has been jamming their signals and even crashed the Exodus drop ship that came down on Unity Day, Abby interrupts them and tries to stop them. Clarke and Raven convince Abby that they need to take down the radio tower on Mount Weather so they can find any other Ark survivors to help build their army. Abby tells Byrne to stay behind and guard the camp because Abby will be going with them to Mount Weather.

Clarke, Abby, Raven, and several other Sky People hike to Mount Weather to take out the radio tower. They stop and survey Mount Weather and Raven spots the radio tower. Finn gets upset because of the way everyone is acting towards him since the massacre and storms off with Clarke following after. Suddenly, Acid Fog starts rolling towards them and Clarke and Finn hid in the bunker. Meanwhile, Abby and Raven take cover in a tent from the Acid Fog as Raven attempts to get a radio signal. She picks up an encrypted channel and realizes they will be able to listen in on Mount Weather. Eventually, while they're still trapped by the Acid Fog, Raven breaks the encryption on the radio channel and they overhear the Mountain Men discussing "the veil." Abby wants to blow the radio tower to find out if there are any other Ark survivors but Raven tells her if she does blow the tower they won't be able to listen to the enemy any more and that she knows what Clarke would do. Once Clarke and Abby meet back up at Camp Jaha, Abby tells Clarke that they decided against blowing the radio tower because they're not sure if there are any Ark survivors but they are sure that there are 47 Sky People trapped in Mount Weather. From the forest, a bloody Jaha approaches and tells them he has a message from the Commander: "leave or die, we have two days."

In Long Into an Abyss, Abby and Jaha discuss their options of what to do about the Commander's order they leave or be killed. Abby wants to rescue the kids in Mount Weather but Jaha wants to flee. Major Byrne interrupts and tells Abby the rest of the Sky People are getting restless and need to hear a word from their Chancellor. Abby goes outside and tells everyone at Camp Jaha that yes, the Grounders have threatened them but they haven't made any decisions yet. Jaha tells everyone to pack and be ready to leave if they need to. He will lead them across The Dead Zone and to The City of Light. Clarke interrupts and asks about the Delinquents still trapped in Mount Weather. Abby tells everyone that no decision has been made yet, and they should all report to their station supervisors. Later, Sgt. Miller tells Abby that he's not leaving Camp Jaha without his son. Abby tells him to pack his things and report to Major Byrne because she wants everyone out of camp by dawn.

As everyone is preparing to evacuate from Camp Jaha, Clarke arrives from the drop ship and tells Abby that she knows how to stop the Grounder threat by showing them the Sky People can save the Reapers. Suddenly, fire start to appear in the darkness of the night and everyone realizes the Grounder army has arrived. Jaha tries to take control of the situation and force everyone to evacuate but Abby stands her ground. Jaha tells Sgt. Miller and Major Byrne to arrest Abby but they only listen when Abby tells them to put Jaha in the stockade. Abby decides to head back to the drop ship to try and save Lincoln, while Clarke goes to talk to the Commander.

Abby arrives at the drop ship and gives Lincoln a shot to bring down his fever when he starts convulsing. He stops breathing and Abby begins chest compressions. Clarke is leading Lexa and her guards through the carnage outside the drop ship while Abby is trying to get Lincoln breathing again. Abby finally gives up and says that Lincoln is gone. Octavia refuses to believe her and continues chest compressions. Clarke and everyone else enters at that moment and they are at a standstill with everyone going for their weapons. Abby picks up the shock baton and holds it in front of her before using it as a defibrillator on Lincoln, shocking him twice before he starts breathing again, much to the Grounders' surprise and the Sky Peoples' relief.

In Spacewalker, Abby and Clarke visit with Octavia and Lincoln who is still recovering from being a Reaper. Abby asks Lincoln how to negotiate with Lexa in order to save Finn but, he says there is no way out of it and Finn must die. Octavia asks what would happen to him and Lincoln tells them that because Finn killed 18, he will suffer 18 deaths as a result. Clarke asks how he can say that about his friend and Lincoln tells Clarke that some of the people Finn massacred were also his friends too. Abby visits Raven where she is locked up in the stockade with Jaha after striking Major Byrne and allows her to go free. Jaha tells Abby she should give Finn up to keep them safe.

Later, as the Grounders start chanting loudly, Jus drein jus daun! ("Blood must have blood!"), Abby walks up to the gate to talk to the two riders Lexa left behind and tells them the Sky People are ready to fight if that is what it comes to. The riders take off back to Lexa's camp and they see someone else approaching: Marcus Kane. Kane, Abby, and a handcuffed Jaha meet to discuss the situation. Kane tells them he has gotten to know the Commander and she might be willing to allow the Sky People to put Finn on trial. Kane tells Abby it is the most merciful outcome for the boy. When Abby leaves the room, Bellamy and Raven confront her, asking her what they're planning to do with Finn and she tells them they are all trying to find a way out of the situation. Bellamy realize that they are going to give Finn up. Kane and Abby go talk with Lincoln again and ask if Lexa would be willing to accept a deal where the Sky People put Finn on trial instead. Lincoln tells them it is not possible because Finn killed innocent people and they're already lucky because if it were up to Indra, all of the Sky People would be dead. Abby decides she needs to speak with Indra. Abby meets with Indra outside Camp Jaha and tells Indra she doesn't want to see any more people die. Indra tells Abby that she lies because they saw Finn in the forest. Indra says that Finn must die for what he has done.

Once Finn surrenders himself to the Grounders, Abby, Clarke, Raven, Bellamy, and the rest of the Sky People watch as the Grounders start setting up for Finn's execution. Abby says there is nothing to be done. Clarke decides to speak to Lexa one more time about sparing Finn's life, and Raven gives her knife before she lives. Abby watches as Clarke asks if she can say goodbye to Finn and Lexa allows her to. Clarke walks over to Finn and hugs him. When she steps away from him, she reveals that she has killed him with the knife Raven gave her. Lexa tells her warriors that it is done and keeps them from attacking Clarke.

In Remember Me, Clarke is alone in Lexa's tent as she tries to scrub Finn's blood off her hands after having mercy-killed him. Abby enters and hugs Clarke as she cries. Marcus Kane enters with Gustus behind him. Gustus tells Clarke the Commander is ready to talk. Lexa tells Clarke that Finn's body will be given to the people of Tondc since Clarke denied them their justice. Kane and Abby get into a disagreement with Indra over this but Clarke agrees to it. She says once it is done, they will talk about getting all of their people, both Sky People and Grounders, out of Mount Weather. Clarke tells Abby that if the truce doesn't hold, she killed Finn for nothing and walks away. Abby tells Kane that the Grounders are being led by a child and he tells, "so are we."

While camping for the night, Clarke places her mat on the side of the Grounders. Bellamy tells her it is safer on their side but Clarke says they need to trust the Grounders. Bellamy places his stuff down on the Grounder side as well. Behind them, Kane and Abby discuss Jaha and what they should do with him. When they arrive at Tondc all the Sky People have to disarm before entering. Raven stubbornly forces Gustus to search her and disarm her. As they enter the village, Grounders shout at the Sky People, calling them murderers. One man stands in their way because he lost both his wife and child. Gustus fights the man and is about to kill him when Clarke begs Lexa to stop him so the Sky People won't get blamed. Lexa calls it off and announces to everyone that if anyone tries to stop the alliance, they will pay with their life. Later, Lexa gives an eulogy for the dead in front of a funeral pyre. She passes the torch to Clarke who steps up and as she lights the pyre, she says, Yu gonplei ste odon ("Your fight is over").

Later, at the alliance banquet, Kane presents Lexa with a bottle of homemade alcohol as a gift. Clarke and Lexa both take a goblet but Gustus stops Lexa and takes a sip first before giving it back to her. As they toast and are about to take a sip, Gustus falls over having been poisoned. The Sky People are searched and they find the poison on Raven. She claims it is not hers and that Gustus put it there when he searched her. Lexa commands for all of the Sky People to be locked up. Clarke asks Raven if she tried to poison Lexa and Raven punches Clarke in the face, and tells her that "She's the only murderer here". Clarke sees Finn standing behind Raven and begins talking to him. Abby tells Clarke she knows how she feels and Clarke doesn't like the comparison between Finn's death and her dad's death but she realizes they are the same. Kane goes over to talk to Clarke and tells her that they need to figure out who would want Lexa dead. They come to the conclusion that the poisoner had to be someone who was trying to break the alliance. Nyko and Indra return and take Raven away. Indra tells them that Lexa is merciful and only wants Raven to die. The rest of them are free and they should run. Raven is tied up outside to a pole where Lexa and Indra begin the "Death by a 1000 Cuts." Clarke soon runs outside and asks Nyko for the bottle and drinks from it, showing it wasn't poisoned. Bellamy realizes that it was Gustus who poisoned the cup because he was trying to protect Lexa from the alliance. Lexa commands him to be tied up in Raven's place. As they're leaving Tondc, Abby approaches Clarke to give her some ashes from the fire to say goodbye to Finn but, Clarke tells Abby that she already said goodbye.

In Coup de Grâce, in the woods, two Mountain Men are hidden from sight as they watch Clarke riding with Abby and several Grounders on their way from Tondc back to Camp Jaha. One of them has his sniper rifle trained on Clarke just as the group stops. Abby tries to get Clarke to drink some puddle water but Clarke refuses, telling her she needs to get back to the radio to see if Bellamy has contacted them yet. As they're mounting up, Carl Emerson, one of the Mountain Men, tells the other one he has a shot. Suddenly, the sniper is hit by an arrow and the bullet misses Clarke, hitting a Grounder behind her. Indra and Octavia have found the Mountain Men and Octavia fights Emerson, tearing his radiation suit. Indra tells her to "finish it" just as Clarke rides up and stops her, telling Octavia they want to keep him alive and to check for a patch kit for his suit. Octavia digs through Emerson's bags and finds a picture of Clarke and Lexa on horseback, the intended targets. Indra sends a rider to go warn Lexa of the attempted assassination.

Back at Camp Jaha, Abby is tries to save the Grounder who was shot instead of Clarke. Jackson is helping Clarke with Emerson when Raven says she can hook up scrubbers to the airlock to make it safe to take off Emerson's protective outerwear. The Grounder ends up dying and Indra tells him, Yu gonplei ste odon ("Your fight is over") as she cuts a braid out of his hair. Clarke tells Abby to let her know when Emerson wakes up. Later, Marcus Kane and Abby are standing watch over an unconscious Emerson. They discuss how the Sky People blood heals the Mountain Men. Abby tells him she's worried about Clarke. Once Emerson wakes up, Kane begins to interrogate him but Emerson just repeats his name and rank. Kane threatens to open the door to get Emerson to talk. Clarke tells Kane that torture doesn't work. Kane storms off and Abby puts Emerson under 24-hour guard. Later, A PA announcement requests Clarke's presence at the airlock where Abby is waiting for Clarke and Kane. She tells them that Jackson found genetic anomalies in Emerson's blood that could have only come from a Sky Person. Clarke wants to kill him but Abby tells Clarke she's not in charge.

After Clarke hears from Bellamy in Mount Weather, she brings Octavia, Indra, and several other Grounders with her to Emerson's airlock where Clarke makes the guard stand down and tells Emerson to get dressed. They take him outside and bring him to the gates where Kane and Abby try to stop her. Abby tells the Ark Guards to get the prisoner back inside but the Grounders behind Clarke step up threateningly. Clarke tells Abby, "you may be the Chancellor, but I'm in charge," and refuses to back down. Kane tells Abby that it is time they started trusting Clarke. Abby tells the Ark guards to stand down and Clarke makes her way through with Emerson. She tells Emerson to deliver a message to Mount Weather and that they have a secret Grounder army that the Acid Fog can't hurt. With the tone generator they got off of Emerson, the Reapers can't hurt them either. Mount Weather has one last chance to let the Delinquents go and the Sky People will let them live. Clarke releases air from Emerson's oxygen tank and tells him he has to make the eight-hour walk back to Mount Weather in six hours. Octavia asks how this will help Bellamy and Clarke tells her that it will make them look outside for this secret army instead of inside where they might find Bellamy and that Bellamy is the key to everything.

In Rubicon, at Camp Jaha, Bellamy comes in over the radio and tells Clarke about how the Delinquents are being taken away one by one. Clarke tells Bellamy to find the missing Delinquents and leaves to tell Kane that she is no longer going to Tondc so he needs to go instead. Abby enters and Kane says that maybe the Chancellor should go to Tondc instead but Clarke says Abby is needed at Camp Jaha. Abby shows Kane the note that Jaha left for them saying he is on his way to The City of Light.

Later, after Clarke finds out about Mount Weather's plan to bomb Tondc, Clarke goes there to warn Lexa. Clarke wants to evacuate everyone but Lexa tells her they can't since Mount Weather will know that they have someone on the inside. While they are sneaking out of Tondc Clarke hesitates and tells Lexa if they can find the spotter that will stop the attack. She suddenly sees Abby arrive in Tondc and goes back for her. Clarke gets Abby to leave with her while Kane and Indra realize Clarke and Lexa have gone missing. The missile hits Tondc causing a massive explosion that knocks Clarke and Abby off their feet. Clarke's ears are ringing as she checks on her mom, telling her they have to go. Abby realizes that Clarke knew about the missile ahead of time and can't believe that Clarke would let it happen. She begs Clarke to tell her it was Lexa's decision and not Clarke who did it, telling her she crossed a line but her secret is safe. Abby leaves in disgust and sadness and heads back into Tondc to help the injuired.

In Resurrection, Abby and Nyko are racing around to the injured survivors in Tondc. Nyko tells her they can only save those who can be saved. Octavia and Lincoln are also trying to help dig people out of the rubble. Octavia tells Abby that she is sure Clarke is okay. Lincoln finds Indra alive under the rubble and pulls her out. Indra calls him a Reaper and tells him to put her down. There is a loud crack and suddenly, Indra is thrown down by a bullet in her shoulder. Everyone runs from the sniper (Whitman) with Lincoln dragging Indra to some coverage. As people try to move, the sniper shoots at them. Abby hears a noise in the rubble and tells everyone there are people still alive. The noise is being made by a half-conscious and pinned-down Marcus Kane. Abby begins crawling through the rubble and finds Kane trapped underneath debris. His leg is badly injured and when Abby tries to free it, they hear a girl calling out. Kane tells Abby that it might be Clarke. Abby is finally able to pry up the beam that has Kane's leg trapped but she quickly realizes the beam on top of him is keeping him from bleeding out and puts it back in place. Kane tells Abby to go find Clarke and Abby finally admits that Clarke and Lexa knew ahead of time and are safe. Just, the rubble shifts and debris comes crashing down around them.

Abby awakens beneath the rubble and is having a hard time getting herself free. She calls out for Kane and shines her light toward him, telling him to wake up. Kane tells her that he's okay and Abby apologizes to him because Clarke is her daughter and knew about the bombing ahead of time. Kane tells her Clarke did it because she grew up on The Ark and it is just like their flotations and cullings. He tells her they have to answer for their sins which makes Abby question if they even deserve to survive. Abby calls out to Kane but he doesn't response. She finally manages to push the concrete slab off herself and crawls over to his side, telling him to hold on. Meanwhile, from above them, Octavia is able to break through to where Kane and Abby are trapped. She tells them she'll get them out.

Later, as they're carrying Kane out, Lincoln returns with Clarke and Lexa and reunites with Octavia. Lexa starts to give a speech about making the Mountain fall and avenging the dead when Abby interrupts and tells them there are still others who need saving and to get back to work. Clarke tells Abby she needs to go back to Camp Jaha with the wounded but Clarke will be marching on Mount Weather because the sniper wasn't wearing a hazmat suit which means they are killing the Delinquents. Abby asks her to not forget that they're the good guys.

In Blood Must Have Blood (Part 2), in Mount Weather, the residents have gathered on Level 5. Cage Wallace is told he is needed in the dorm where all of the Sky People are tied up as they extract bone marrow from a Delinquent. Emerson tells Cage that they suffered losses and he is the only one left who has received the bone marrow treatment. Emerson reveals the four additional Sky People they captured outside the Mountain: Monroe, Sgt. Miller, Abby, and Marcus Kane. The Delinquent on the table dies and they pick Raven to be used next.

Later, in the Command Center, Clarke tells Cage she has his father will kill Dante if he doesn't let her people go. Dante tells Cage to "stay the course" and Clarke raises up her gun and aims it at Dante. Cage tells his dad he'll take care of their people and Clarke shoots Dante dead. Clarke tells Cage she will not stop until her people are free and will irradiate Level 5 if he doesn't let them go. Clarke tells Monty to get it set up so they can irradiate Level 5 if they have to. In the dorm, Cage orders Raven to be removed from the table and has Abby put on instead. Kane tells them no one has to die because the Sky People can donate it to the Mountain Men. Cage tells him that it will never happen and they can't all survive as they begin drilling into Abby. Bellamy warns Clarke there is no going back if they do this. Monty finishes the settings to irradiate Level 5 as Abby is unconscious on the table, being drilled for bone marrow. Clarke reaches for the lever and Bellamy places his hand on top of hers, saying, "together," and they pull the lever. The Mount Weather residents begin to succumb to the radiation. Octavia runs into the dorm and begins freeing the Sky People as Kane runs over to Abby to help her. Clarke is reunited with her mother in the dorm and tells her she tried to be the good guy. Abby tells her that "maybe there are no good guys." The next day, the Sky People return to Camp Jaha. Kane and Abby enter first with Abby on a stretcher while Kane holds her hand.

Personality
Abby is a strong willed individual who tries to fight for what is right for others and her family.

Physical Appearance
Abby has brown hair and brown eyes. She is often seen wearing jeans and a leather jacket.

Clarke Griffin
Clarke Griffin is Abby's daughter. Before Clarke is sent down to Earth in the Pilot, Abigail tells her to be safe and that she loves her. After, Abigail closely watches over Clarke's vitals. While on Earth, Clarke learns the truth about her mother's involvement in her father's death in Earth Kills. This causes a rift between Clarke and her mother. To punish her mother for her father's death, she takes her wristband off, letting Abigail believe her to be dead. When Raven Reyes makes contact with the Ark in Contents Under Pressure, Clarke confronts her mother and tells her she knows the truth. Abigail tries to apologizes explain his death was never supposed to happen. Clarke truly believes she will never be able to forgive her mother for turning in her father. When Clarke believes her mother to be dead in the Exodus ship crash, she is devastated.

When they are reunited in Many Happy Returns, Clarke is happy to see her but their relationship is strained. Clarke goes behind Abby's back to the point of usurping her authority on numerous occasions. Abby often disagrees with the decisions Clarke makes in regards to the people. Tensions escalate in Coup de Grâce when Clarke tells her mother that even though Abby is the Chancellor, Clarke is the one in charge. In Resurrection, when Abby finds out that Clarke knew ahead of time about the bombing of Tondc, she is appalled that her daughter would do such a thing and begs her to not forget they are the good guys. By Blood Must Have Blood (Part 2), Abby has come to realize the difficult choices her daughter has had to make are not so different than the choices she made on The Council and tells her daughter that maybe there are no good guys.

Jake Griffin
Abby loved her husband Jake dearly. When Jake announced that he wanted to go public about the fact The Ark was dying, Abby tries to convince him not to because she knows he will be floated. She turns to their friend Jaha in the hope that he will talk him out of it, but her telling Jaha of her husband's plans leads to Jake's execution. This devastates both Abby and also her daughter Clarke Griffin. However, while Abby knows the truth about Jake's death and blames herself, Clarke thinks it was the fault of Wells Jaha, who she told Jake's plan to in confidence. When Wells tells Clarke the truth, she is angry at her mother, but when the Exodus ship Clarke thinks Abby was on is crashed by Mount Weather, Clarke is distraught. When the two reunite in Season Two, Episode Five, Human Trials, Clarke shows no anger towards her mother because she is so relieved to find Abby is alive. While Clarke may not have completely forgiven Abby, their relationship is mostly healed.

Marcus Kane
On the Ark, Abby and Marcus Kane constantly had opposing views. Kane saw Abigail as a threat to his goals and frequently had her arrested and even almost floated her once due to his strict rule-following and her bending of the rules. Later, in The Calm, he seems to start caring for Abby, saving her life when he is exploring the other deck to look for survivors. On Earth, Marcus was the first person to follow Abby out of the Ark ship once it landed.

In The 48 they go out looking for the The Camp of the Delinquents and Clarke together. When Abby gives guns to the Delinquents to help them escape and look for Clarke and the others, Marcus sentences her to shock-lashing in Reapercussions before passing along the Chancellorship to Abby. In Resurrection, Abby finds Marcus trapped under rubble after the missile on Tondc, pulling on a piece of metal to make noise and she grabs his hand to stop him. Abby tries to help him and he tells her to leave him and go find Clarke until Abby explains that Clarke got out as she already knew about the attack. When rocks fall down and trap them both further, they talk about how their actions on the Ark have influenced Clarke and the sins they have to answer for. Later, after they are captured by Mount Weather and Abby has her bone marrow extracted, they return to Camp Jaha, holding hands.

Killed

 * Jake Griffin (indirectly)

Notes and trivia

 * In the book series, Abby and Jake are called Mary and David.
 * Abby has never killed someone (directly)
 * Due to Abby's invaluable medical expertise, she is given several exemptions instead of being floated. She was charged with:
 * Theft of medical supplies
 * Illegal salvaging (of Mir-3)
 * Unauthorized ship launch (of Raven's pod)
 * Pirating The Ark comm systems (to play Jake Griffin's video about the oxygen problem)