Brad makes a deal with Sykes and Richards to stay with Amy at Project NOAH as they begin testing the virus on her, then forms an alliance when he discovers the truth about the state of the inmates in 4B; Babcock sheds light on her past.

Cast: Mark-Paul Gosselaar, Emmanuelle Chriqui, Trieste Kelly Dunn, Brianne Howey, Vincent Piazza, Brianna Brown, Henry Ian Cusick, Saniyya Sidney, Caroline Chikezie, Jamie McShane, Jason Fuchs, McKinley Belcher III, Adam Aalderks, Alain Uy, Julia Vasi