Cain Fletcher

Cain Fletcher is a member of the School Group and serves as the main antagonist of season 1.

"Pilot"
Cain complains about the year seven boy, and later tries to convince the group that they should try to escape the school. When Blake and Charlie later accidentally draw infected to the canteen, Cain expresses his annoyance at them.

"Take it Back"
Frank and Cain go and distract the group of infected so that Blake and Joely can go to the nurse's office. On the way, they manage to take down a large number of the dead and when they return to find that Blake and Joely are not there, Frank decides to go look for them. Cain, however, refuses and Frank is instead joined by Claire. Cain later disagrees with the idea of staying at the school and clearing it out but is forced to comply as all the others have agreed to it.

"Keep Pushing Forward"
Cain does not appear much in this episode. After helping take the last building in the school, he explains to Charlie that he does not trust Blake to "do the right thing" when the time comes.

"A Safe Place"
Cain, Blake, Joely, and Frank all go to the local supermarket with the intention of loading up on food. They are soon joined by bandits, who capture Joely and Frank. Cain and Blake argue over what to do, with the former suggesting killing them. This horrifies Blake and he refuses, infuriating Cain just as one of the bandits finds them. Before he can alert the others, however, Cain chokes him to death, much to Blake's disgust.

They make their way back to the front of the supermarket, but Cain is taken hostage by Tony. Eventually, Cain manages to get free and Blake smashes the window next to the bandit, allowing them to devour him.

Later that night, once they have retaken the school, Cain tells Blake that he blames him for what happened, saying that "if you hadn't sent our best fighters on some stupid fucking mission, we wouldn't have had any of this mess." Blake finally snaps, telling him that "whether you like it or not, for some reason, I'm calling the shots."

"Trouble Afoot"
Cain is first seen in this episode beating up the no-captured Tim, who insists that there are no more of their group left. Cain does not believe this and goes to keep beating him, but is stopped by Blake.

When the herd of infected threaten to destroy the school, Cain tries to convince Blake that they need to leave. Blake, however, decides against this, opting to try and divert the herd away. Cain argues with him, accusing him of trying to feed his ego, but their argument is stopped by Joely.

When Blake and Joely successfully redirect the herd, Cain finally appears to snap, leading Blake to the supermarket, stabs him in the stomach, and leaves him for dead.

"What You Have To Do"
Two days later, Cain has seemingly taken the leadership role from Blake after his "death". Though the rest of the group suspects his involvement. This comes to a head when they confront him in the common room. They surround him, demanding answers, and Cain soon snaps, grabbing Claire and choking her. The whole group can't seem to get him off her until Blake returns after being nursed back to health by the Cottons. He gets him off Claire and beats him down. The group then imprison him in the changing rooms with Tim.

"What We Are"
Now locked up, Cain is frequently visited by Blake, who appears to want to know why he betrayed him. Cain, however, barely speaks to him. Later in the episode, Cain manages to escape while Tim is asleep. He sneaks outside and manages to kill Frank, biting him on the neck and tearing a chunk of flesh out. When Maeve sees this, she screams and tries to run, but he grabs her and covers her mouth.

"What We Become"
With Maeve in tow, Cain manages to escape the school, taking her to the supermarket. The next day, he ambushes Charlie and Joely, knocking the latter out and trying to stop the former from resisting. Charlie, however, fights back, knocking him into a group of infected that bites him on the arm. He tells Charlie to make Blake come to the supermarket, then runs off.

Later, Blake arrives. Cain begins explaining that the bandit's attack on them in the supermarket is the moment he decided Blake has to die. Blake then pulls out his gun and tries to shoot him, but Cain knocks it out of his hand and the two fight. Cain manages to stab Blake in the shoulder, but Joely stabs him in the back, allowing Blake to escape. He then tells Blake that he won't kill him, saying he's "too weak" and he can't "become what I've become." He is proven wrong, however, when Blake shoots him in the throat, killing him.

"What Have You Done?" (Hallucination)
Cain appears to Maeve multiple times as a hallucination.

Blake
Cain initially doesn't like Blake, calling him a "nobody" and immediately arguing about how Blake has "killed us all". Blake is also unable to convince Cain to help them stay at the school, and he only changes his mind because everyone else has agreed to it. Their relationship continues to degrade, despite Blake's best efforts to mend it until he snaps and tells him that he is in charge.

Soon after this, Cain attempts to kill Blake, stabbing him in the stomach and leaving him for dead. Cain's hatred for Blake only seems to grow when he inexplicably survives, turning the whole group against him and locking him up. In his last words, Cain even claims that Blake is "too weak" to kill him, seemingly in a fit of pride before being shot in the throat.

Joely
From the beginning, Joely openly states that she does not like Cain, but she does, however, agree with his statement that they should leave the school. This changes, however, when Joely changes her mind and sides with Blake. Soon, whatever relationship they had degrades further as Cain becomes more and more brutal. After Blake's "death," Joely does not believe Cain's story and begins to suspect him. This comes to a head when the group confronts him about it and his attempted murder of Blake is revealed.

Frank
Cain and Frank argued frequently at the beginning. They disagreed on whether they should stay at the school and had conflicting opinions. After Blake's supposed death, Frank secretly suspected Cain's involvement, though he kept it to himself to prevent "fighting amongst ourselves."

Charlie
Charlie and Cain's relationship does not start well and only gets worse as the series progresses. Charlie almost immediately grows suspicious of him after Blake's supposed death and he soon accuses him of murder. When Cain escapes and kills Frank, Charlie grows furious when they next meet, trying and failing to kill him.

Chloe
Cain and Chloe do not interact much, but it can be assumed that they do not like each other, especially after his attempted murder of Claire.

Claire
Cain and Claire do not agree on much throughout the series. Following Blake's "death," Claire is one of the members of the group that confronts him about what happened. Her calling him a "murderer" is the last straw that makes him snap, choking her.

Maeve
Cain does not appear to care for Maeve much at all. He kidnaps her and uses her as bait to get Blake to come to the supermarket.

Killed by:
After kidnapping Maeve, Cain draws Blake to the supermarket. They soon begin to fight, with Cain coming close to winning and stabbing him in the shoulder. Blake is saved, however, by Joely, who stabs him in the back, letting Blake get free. Having been bitten and possibly losing his sanity, Cain begins to rant that Blake is "too weak" to kill him and believes that he won't do it. This is proven wrong when Blake shoots him in the throat, leaving him to bleed out and be devoured by infected.
 * Infected (Indirectly caused)
 * Blake Floyd

Killed Victims

 * Year Seven Boy (Zombified)
 * Frank Bowers
 * 1 unnamed bandit
 * Numerous infected

Trivia

 * Cain can be considered the first primary antagonist in the show.
 * Previous antagonists such as Logan can only be considered secondary due to their limited appearances.
 * Cain's death is reminiscent of his murder of Frank.
 * Both characters bled out from a wound in the neck.
 * Since Cain's body is no longer in the place where he died (as seen in "What Have You Done?"), it can be assumed that he turned shortly after being killed.