Matthew Atkinson (Josh Kendricks), Lexi Johnson (Kat Rivers), Eric Etebari (Bürgermeister Jones), Amy Paffrath (Jessica), Harry van Gorkum (Professor Quinn Irwin), Tom Schanley (Robson), Victoria Gabrielle Platt (Ava), Matthew Willig (Serge), Kelcey Watson (Lt. Talbot), Christina Wren (Simon), Sachin Bhatt (Kent), John Patrick Jordan (Bennett), Tom Parker (Stern), Matt Riedy (Foreman), Cris D'Annunzio (Murph), Jed Rowen (PFC Henning), Boni Yanagisawa (Krankenschwester), Frank Buckley (Nachrichtensprecher), Leeann Tweeden (Nachrichtensprecherin), Jude Lanston (Sawyer), Cosima Cabrera (Sophia), Tim Scanlon (Soldat), Rene Aranda (Soldat), Harvey B. Jackson (Soldat der Nationalgarde Murray), Sophia Wu (Arzthelferin), Steven Louis Goldenberg (Klempner)