Tensions are high with a viral on the loose outside Project NOAH, as Guilder and Richards hurry to mobilize a search party. Amy volunteers to help in an unexpected way, causing friction between her and Brad. Lear tries to help a lucid Elizabeth under... (more)stand the tough decisions he's made while at NOAH. A surprising connection between Sykes and Babcock is revealed.

Brett Gentile, Darrell Snedeger, Francine Locke, James Le Gros, Jennifer Ferrin, Jessica Roth