Fox is a big flirt.

The network and multiple executive regimes have a long history of falling in love with TV shows that sound great on paper -- "The Tick," "Firefly," "Wonderfalls" -- and just as quickly losing interest.

This year's victim was Pittsburgh-set newsroom sitcom "Back to You," which has been canceled.

When Fox launches its fall schedule on Aug. 25, the network will have two more potential victims with additional shows waiting in January.

Fox confirmed that a "24" TV movie will air this fall. Slated for 8 p.m. Nov. 23, the two-hour production is a prequel to season seven, which debuts in January. The film will be shot on location in South Africa, "exploring Jack's complex emotional state of mind," according to executive producer Howard Gordon, as Jack Bauer (Kiefer Sutherland) handles an international crisis. Back in America, a new president (Cherry Jones) is about to be inaugurated.

Although Fox inexplicably renewed " 'Til Death," Entertainment Weekly reports the young couple next door, played by Eddie Kaye Thomas and Kat Foster, will be dropped in favor of the character introduced this season played by J.B. Smoove.

"It's creatively up for grabs right now," said Fox Entertainment president Kevin Reilly. "I'm not sure where we're at with that."

As for "Back to You," Reilly said the show's cost and demographic appeal were factors in its cancellation, but not the ultimate factor.

"This was not an easy decision," Reilly said, but with big-name stars in Kelsey Grammer and Patricia Heaton, there were expectations for better ratings. "The show didn't really seem to be striking a chord and as far as the creative direction went, it was a pretty mixed bag.

"We're looking to find the next generation of live-action Fox hits," he said, "and where the show was headed, it just didn't feel like it fit into that mix."

Three unaired "Back to You" episodes remain and will likely wind up on DVD. Other canceled series include "Canterbury's Law," "K-Ville," "New Amsterdam," "The Return of Jezebel James" and "Unhitched."

Fox will likely continue to be a flirt in the future, falling in and out of love with the next pretty thing that walks by. Take heart disgruntled viewers; it's not you, it's them.

Here's Fox's fall schedule, with new series in bold:

Sunday

7 p.m.: "The OT" (NFL post-game)

8 p.m.: "The Simpsons."

8:30 p.m.: "King of the Hill."

9 p.m.: "Family Guy."

9:30 p.m.: "American Dad."

Monday

8 p.m.: "Terminator: The Sarah Connor Chronicles."

9 p.m.: "Prison Break."

Tuesday

8 p.m.: "House."

9 p.m.: "Fringe" -- J.J. Abrams ("Lost," "Alias") is among the executive producers of this mysterious drama about the investigation into an international flight that lands in Boston with all its passengers and crew dead. Joshua Jackson ("Dawson's Creek"), Mark Valley ("Boston Legal"), Blair Brown ("Days and Nights of Molly Dodd") and Lance Reddick ("The Wire") star.

Wednesday

8 p.m.: "Bones."

9 p.m.: " 'Til Death."

9:30 p.m.: "Do Not Disturb" -- Written by Washington, Pa., native Abraham Higginbotham ("Back to You"), this sitcom stars Niecy Nash ("Reno 911") as head of human resources at a hip New York hotel. She tries to keep the egomaniac general manager (Jerry O'Connell, "Carpoolers") under control.

Thursday

8 p.m.: "The Moment of Truth."

9 p.m.: "Kitchen Nightmares."

Friday

8 p.m.: "Are You Smarter Than a 5th Grader?"

9 p.m.: "Don't Forget the Lyrics."

Saturday

8 p.m.: "Cops."

8:30 p.m.: "Cops."

9 p.m.: "America's Most Wanted: America Strikes Back."

11 p.m.: "Mad TV."

Midnight: "Talk Show With Spike Feresten."

Midseason

In addition to the return of "24" and "American Idol," these new shows are slated to debut in January:

"The Cleveland Show" (9:30 p.m. Sunday): In this "Family Guy" spin-off, Cleveland Brown (voice of Mike Henry) moves to Stoolbend, Va., with a woman he's loved since high school.

"Dollhouse" (8 p.m. Monday): "Buffy the Vampire Slayer" creator Joss Whedon reunites with "Buffy" player Eliza Dushku, who stars as a member of an underground group of agents who have had their personalities wiped clean. Then she begins to remember. Harry Lennix ("Commander in Chief") and Tahmoh Penikett ("Battlestar Galactica") also star.

"Secret Millionaire" (9 p.m. Thursday): Millionaires go undercover to live among the less fortunate. In the end, they'll hand out at least $100,000.

"Sit Down, Shut Up" (8:30 p.m. Sunday): Fox's second new animated comedy comes from "Arrested Development" creator Mitchell Hurwitz and focuses on teachers at a small-town high school. "Arrested" alumni Jason Bateman, Will Arnett and Henry Winkler are among the show's voice cast.