While the CDC tries to deal with the captives' contagion, Martinez and Blake try to negotiate with Thomas. Meanwhile, Simon talks to Sophia about Thomas, and Collier closes in on Vicky and Carter.

Cast: Jason Ritter, Sarah Roemer, Laura Innes, Ian Anthony Dale, Scott Patterson, Taylor Cole, Lisa Vidal, Bill Smitrovich, Clifton Collins Jr., Zeljko Ivanek, Blair Underwood, D.B. Sweeney, Heather McComb, Rosalind Chao, William Russ