After months on the run, the group take refuge in a federal prison, while elsewhere, Andrea's health starts to deteriorate.

As Hershel's condition worsens, Rick, Daryl and T-Dog deal with a group of prisoners.

Andrea and Michonne are brought to a walled community run by a man called The Governor.

Lori goes into labor when the prison comes under attack. Michonne tries to convince Andrea to leave Woodbury.

Rick struggles to cope. Andrea and Michonne part ways. Daryl and Maggie head out to find food and clothes for the baby.

Michonne leads Rick, Daryl and Oscar to Woodbury to rescue Glenn and Maggie. Merle tries to force information out of Glenn.

Rick, Daryl, Michonne and Oscar enter Woodbury in search of Glenn and Maggie. Meanwhile, a new group of survivors encounter the prison.

Woodbury is left in disarray following the attack by Rick's group. Merle's presence in the group causes conflict.

Rick continues to see visions of Lori. The Governor plans an assault on the prison. Daryl and Merle fend for themselves out in the forest.

As Rick and the group debate their next course of action, Andrea tries to negotiate with them. Meanwhile, The Governor prepares Woodbury for battle.

Rick runs into a familiar face when he, Carl and Michonne head back to Rick's hometown for more guns to fortify themselves against The Governor.

Rick and The Governor meet face-to-face, ostensibly to make a peaceful resolution to prevent further bloodshed. Back at the prison, tensions arise between Merle and the rest of the group.

The Governor hunts down Andrea when she flees Woodbury. Meanwhile, tensions arise within Tyreese's group, and The Governor's plan for Rick's group is sabotaged.

While Rick decides the fate of Michonne, Merle takes matters into his own hand.

As Rick and the group prepare for the Governor's impending attack, Andrea fights to escape captivity.