- Writers: Frank Darabont
- Stars: Alanna Masterson , Andrew Lincoln , Chandler Riggs , Christian Serratos , Danai Gurira , Emily Kinney , Josh McDermitt , Lauren Cohan , Laurie Holden , Melissa McBride , Michael Cudlitz , Norman Reedus , Sarah Wayne Callies , Scott Wilson , Sonequa Martin-Green , Steven Yeun
After Patrick falls sick and dies, he begins attacking others inside the prison, showing just how vulnerable they all are. Before they know it, the cell block is infested with walkers. The residents have been exposed to a severe strain of the flu and as they die, they turn into walkers. They begin by isolating those with flu symptoms. Carol continues in her quest to teach the children they have to be strong. Someone is feeding live rats to the walkers and they nearly push in the outer fence. Two people are found burned to death.