With the need to find a place to stay rising, Rick leads the group on a clean-up mission of a federal prison. Drastic measures are taken to save the life of one of the group members after an attack by a walker.
As Hershel's life hangs in the balance, Rick makes a decision about the surviving prisoners as the group continues to clear the prison from walkers.
Andrea encounters a familiar face. Michonne and Andrea discover a survivor community whose perfect veneer hides a dark secret.
A betrayal leaves Rick's group fending off a brutal walker attack. Maggie finds herself in a terrifying predicament that proves traumatizing to both her and Carl.
With Rick reeling from Lori's death, the rest of the group band together to take care of the baby. Michonne uncovers The Governor's secret and leaves Woodbury.
Rick is haunted by the past. On the hunt for Michonne, Merle captures Glenn and Maggie. Michonne finds her way to the prison.
Under duress, Maggie is forced to give up her group's location. Michonne leads Rick's group to Woodbury.
The rescue mission leads to an uncomfortable confrontation between Daryl and Merle. Another survivor group comes across the prison.
Daryl faces a hard choice between his group and his brother. Andrea and The Governor deal with the aftermath of the attack by Rick's group. At the prison, the two survivor groups come face-to-face.
As The Governor launches an attack on the prison, Daryl and Merle come to a decision that could mean life or death for both themselves and Rick's group.
While Andrea tries to prevent an all-out war between the survivor communities, Tyreese and Sasha's group betray Rick's group to The Governor.
A journey to Rick's hometown for supplies leads to a meeting with an old acquaintance and a discovery about Michonne.
Andrea makes a final bid for peace. Rick refuses to give Michonne up to The Governor. Merle's presence stirs discord in the prison.
Andrea realizes The Governor's real intent and tries to warn Rick. The Governor faces a shocking betrayal among his ranks.
Merle comes to a shocking decision regarding Michonne. Daryl contends with a personal tragedy.
Tensions rise in Woodbury as The Governor's paranoia gives way to brutality. The Governor's men and Rick's group go head-to-head in a fight for survival.