Audrey pursues diplomatic channels to try to prevent a full-scale war. Meanwhile, Jack leads Kate and Mark on a mission to locate their target before it's too late and the world is changed forever.

Cast: Kiefer Sutherland, Gbenga Akinnagbe, Benjamin Bratt, William Devane, Tate Donovan, Michelle Fairley, Julian Gillard, Tzi Ma, Giles Matthey, Ross McCall, Adam Prickett, Mary Lynn Rajskub, Kim Raver, Alexis Rodney, Adam Sinclair