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Glenn (Steven Yeun), Dr. Eugene Porter (Josh McDermitt) and Tara (Alana Masterson) during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Walker during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Glenn (Steven Yeun) during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Abraham (Michael Cudlitz) during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Glenn (Steven Yeun) during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Carl Grimes (Chandler Riggs) during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Carl Grimes (Chandler Riggs) and Michonne (Danai Gurira) during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Carl Grimes (Chandler Riggs), Michonne (Danai Gurira) and Rick Grimes (Andrew Lincoln) during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Carl Grimes (Chandler Riggs), Michonne (Danai Gurira) and Rick Grimes (Andrew Lincoln) during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Daryl Dixon (Norman Reedus) during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Walker during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Rosita Espinosa (Christian Serratos), Dr. Eugene Porter (Josh McDermitt) and Abraham (Michael Cudlitz) during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Rick Grimes (Andrew Lincoln), Carl Grimes (Chandler Riggs) and Michonne (Danai Gurira) during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Tara (Alana Masterson), Glenn (Steven Yeun) and Walkers during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Walker during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Abraham (Michael Cudlitz) during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Jeff Kober, Daryl Dixon (Norman Reedus) and Davi Jay during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Tara (Alana Masterson) and Glenn (Steven Yeun) during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Glenn (Steven Yeun) during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Daryl Dixon (Norman Reedus), and Jeff Kober during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Tara (Alana Masterson), Rosita Espinosa (Christian Serratos), Dr. Eugene Porter (Josh McDermitt) and Glenn (Steven Yeun) during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Glenn (Steven Yeun) during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Rick Grimes (Andrew Lincoln) during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Daryl Dixon (Norman Reedus) during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Michonne (Danai Gurira) during Episode 15 of 'The Walking Dead' televised on Sunday, March 23, 2014. (Gene Page/AMC)

Norman Reedus and Greg Nicotero on the set of of 'The Walking Dead.' (Gene Page/AMC)

Steven Yeun on the set of of 'The Walking Dead.' (Gene Page/AMC)

Walker on the set of of 'The Walking Dead.' (Gene Page/AMC)

Greg Nicotero on the set of of 'The Walking Dead.' (Gene Page/AMC)