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U.S.-RUSSIA TREATY GOES FORWARD AND CIRCUMSTANCES AT CTU TAKE A SHARP TURN ON "24" FRIDAY, JUNE 23, ON FOX

In the series' 100th episode, Agent Bauer is forced out of hiding and hostiles forcibly command him to undermine CTU's tactics to halt the hostage scenario. Despite the escalating terror threat, circumstances at CTU are further complicated when Lynn McGill (Sean Astin) from Homeland Security arrives. As the historic treaty signing proceeds, the insistent First Lady spins into a risky state of affairs while the terrorists up the stakes and uncover 20 canisters of weaponized nerve gas in the "Day 5: 10:00 A.M.-11:00 A.M." episode of "24" Friday, June 23 (9:00-10:00 PM ET/PT) on FOX. (TWF-504) (TV-14 V)

Cast: Kiefer Sutherland as Jack Bauer, Carlos Bernard as Tony Almeida, Kim Raver as Audrey Raines, Mary Lynn Rajskub as Chloe O'Brian, Roger Cross as Curtis Manning, Louis Lombardi as Edgar Stiles, James Morrison as Bill Buchanan, Gregory Itzin as President Logan, Jean Smart as First Lady Martha Logan.

Guest Cast: Connie Britton as Diane Huxley, Brady Corbet as Derek Huxley, Jude Ciccolella as Mike Novick, John Allen Nelson as Walt Cummings, Jonah Lotan as Spencer Wolff, Sandrine Holt as Evelyn.