ABC is about to perform a time-slot makeover on "Extreme Makeover," while Fox is flip-flopping the Thursday and Friday time slots of fledgling drama "Wonderfalls" and reality-soap "Forever Eden."

ABC's reality show chronicling plastic surgery transformations is moving out of primetime's toughest time slot -- the Thursday 9 p.m. hour, where the competition includes CBS' "CSI: Crime Scene Investigation" and NBC's "The Apprentice" -- to Wednesday 10 p.m. as of April 14.

To make room for "Makeover," ABC will relocate midseason drama "Stephen King's Kingdom Hospital" from Wednesday 10 p.m. to Thursday 9 p.m. as of April 1. "Kingdom's Hospital" had an encouraging two-hour premiere this month but has since done a fast fade.

Even against tough competition, the hourlong "Makeover" has consistently posted a ratings spike in its second half-hour. ABC executives are hoping that the Wednesday switch will allow "Makeover" to capitalize on a strong lead-in from 9 p.m.'s "The Bachelor," which returns to ABC's lineup with a two-hour premiere April 7. Still, "Makeover" will have to face NBC's long-dominant "Law & Order" in the time slot.

Meanwhile, Fox is planning to test out a Thursday 9 p.m. time-slot shuffle this week by temporarily relocating "Wonderfalls" from Friday to Thursday to pair the critically praised series with fellow freshman drama "Tru Calling." "Forever Eden" moves from Thursday 9 p.m. to "Wonderfalls' " Friday 9 p.m. time slot, where it will run in tandem with 8 p.m. dating-reality show "Playing It Straight."