Killer Within

"Killer Within"
The Walking Dead episode
Carl prepares to put down his mother before reanimation after giving birth to Judith.
Episode no.	Season 3 Episode 4
Directed by	Guy Ferland
Written by	Sang Kyu Kim
Original air date	November 4, 2012 (2012-11-04)
Guest appearances
IronE Singleton as Theodore "T-Dog" Douglas Emily Kinney as Beth Greene Lew Temple as Axel Markice Moore as Andrew Vincent M. Ward as Oscar
Episode chronology
← Previous "Walk with Me" Next → "Say the Word"
The Walking Dead season 3
List of episodes

"Killer Within" is the fourth episode of the third season of the postapocalyptic horror television series The Walking Dead. It originally aired on AMC in the United States on November 4, 2012, and was written by Sang Kyu Kim and directed by Guy Ferland. The episode marked Sarah Wayne Callies and IronE Singleton's final appearances as Lori Grimes and Theodore "T-Dog" Douglas and as regular actors on the show. Most television critics positively reviewed the episode, applauding its bleak undertones and the performances, but some commentators criticized the narrative ploys and the direction taken in the program. "Killer Within" was viewed by 9.27 million viewers, including 4.9% of those in the 18 to 49 demographic upon its initial broadcast in the United States. The episode is often cited as one of the show’s best episodes.