Following the explosion, surprising alliances are formed and a key figure returns to convince everyone to fight for their lives.

Cast: Mark-Paul Gosselaar, Saniyya Sidney, Jamie McShane, Caroline Chikezie, Emmanuelle Chriqui, Brianne Howey, McKinley Belcher III, Henry Ian Cusick, Vincent Piazza, Sarah Bennani, Gilbert Glenn Brown, Joseph Curtis Callender, M.C. Gainey, Tod Lautenberg, Robert Pralgo