S1, E10: President Martinez (Blair Underwood) confronts the traitor in his administration, only to be met with threats of exposing the cover-up of Avias Air 514. Even after testing the loyalty of Isabel (guest star Necar Zadegan) and Thomas (Clifton Collins, Jr.), Sophia (Laura Innes) still suspects their subterfuge, so she sends Simon (Ian Anthony Dale) on a fact-finding mission. Her suspicions are confirmed when Thomas unveils a shocking new plan. Meanwhile, on the hunt for Samantha, Sean (Jason Ritter) and Leila (Sarah Roemer) battle the mercenaries sent by Dempsey (guest star Hal Holbrook). Zeljko Ivanek, Bill Smitrovich, Taylor Cole, and Lisa Vidal also star.