A threat forces CTU to go on lock-down. Carter finds himself in a tense situation. Donovan reaches out to Rebecca when he faces a big decision in his campaign.

Cast: Corey Hawkins, Miranda Otto, Anna Diop, Teddy Sears, Ashley Thomas, Dan Bucatinsky, Coral Peña, Charlie Hofheimer, Sheila Vand, Raphael Acloque, Jimmy Smits, Christina Bach, Carlos Bernard, Heighlen Boyd, Trey Butler