PA: Viewer discretion is advised.

A COMPROMISED CTU FORCES CHANGE ON "24" FRIDAY, JULY 21, ON FOX

When Homeland Security officials Karen Hayes and Miles Papazian arrive at CTU to clean up a worrying situation, they are met with resistance. While CTU faces its own leadership issues, the Administration is complicated by the recent arrival of Vice President Hal Gardner and remains at the mercy of the terrorists in the "Day 5: 7:00 PM-8:00 PM" episode of 24 airing Friday, July 21 (8:00-9:00 PM ET/PT) on FOX. (TWF-513) (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: Jayne Atkinson as Karen Hayes, Stephen Spinella as Miles Papazian, Peter Weller as Christopher Henderson, Ray Wise as Vice President Hal Gardner, Jude Ciccolella as Mike Novick, Stana Katic as Collette Stenger, Yorgo Constantine as Mikhail, Peter Weller as Christopher Henderson, Julian Sands as Vladimir Bierko, Elisha Cuthbert as Kim Bauer, C. Thomas Howell as Barry Landes,Glenn Morshower as Agent Aaron Pierce