Jack pursues final leads at all costs. Kate learns the truth about her husband. Audrey confronts Mark about his duplicity. The scope of the terror threat widens and the potential devastation reaches new heights.

Cast: Kiefer Sutherland, Gbenga Akinnagbe, Benjamin Bratt, Greg Canestrari, William Devane, Mandeep Dhillon, Tate Donovan, Michelle Fairley, Gary Fannin, Tzi Ma, Giles Matthey, Ross McCall, Mary Lynn Rajskub, Kim Raver, Arkie Reece