With doubt still surrounding the tragedy at the White House, Sterling encounters an unlikely ally in Simon, who risks his life to return with a possible antidote. Against the wishes of Chief of Staff Richard Peel, Jarvis authorizes an air strike to neutralize them. Meanwhile, Sophia continues on her diabolical plan to exterminate the human race, now with the help of an unwitting accomplice -- Leila
Elenco: Blair Underwood , Zeljko Ivanek , Laura Innes , Scott Patterson , Jason Ritter , Sarah Roemer , Taylor Cole , Lisa Vidal , Clifton Collins , Jr. , Bill Smitrovich , Wes Ramsey , Clea DuVall , Hal Holbrook .