The Walking Dead/Killer Within

Killer Within
Season 3, Episode 4
Airdate	November 4, 2012
Written by	Sang Kyu Kim
Directed by	Guy Ferland
Stream
← 3x03 Walk With Me	3x05 → Say the Word
The Walking Dead — Season Three

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Killer Within is the fourth episode of the third season of The Walking Dead, and the twenty-third episode overall.

Starring: Andrew Lincoln (Rick Grimes), Sarah Wayne Callies (Lori Grimes), Laurie Holden (Andrea Harrison), Norman Reedus (Daryl Dixon), Steven Yeun (Glenn Rhee), Lauren Cohan (Maggie Greene), Chandler Riggs (Carl Grimes), Danai Gurira (Michonne), Michael Rooker (Merle Dixon)

and David Morrissey (The Governor)

Also Starring Melissa McBride (Carol Peletier), Irone Singleton (Theodore "T-Dog" Douglas), Emily Kinney (Beth Greene), Lew Temple (Axel)

and Scott Wilson (Hershel Greene)

Co-Starring: Markice Moore (Andrew), Vincent Ward (Oscar)

Plot Overview

The safety of the prison is compromised by someone from within. With the group broken, walkers invade and everyone races to stay alive.

Back in Woodbury, Merle hopes to find his brother.

Trivia

The Show

• There is no music played during the closing credits of this episode in honour of the characters who died in this episode.

Behind the Scenes

• Lauren Cohan revealed years later that reading the c-section scene in the script made her want to quit the show.