In a separate transaction from its purchase of UPN, Viacom purchased KCOP's rival, KCAL-TV, from Young Broadcasting on June 1, 2002.
Rumors persisted that UPN would move to the higher-rated KCAL, reverting KCOP to independent station status.
With Fox's acquisition of KCOP, the station abandoned its longtime Hollywood studios at 915 North La Brea Avenue (once home to the classic Barry & Enright-produced game shows The Joker's Wild and Tic-Tac-Dough, and short-lived B&E entry Play the Percentages) with KCOP's news and technical operations being moved into KTTV's facilities at the Fox Television Center in West Los Angeles in 2003. unit of Time Warner and CBS Corporation announced that the two companies would shut down UPN and The WB and combine the networks' respective programming to create a new "fifth" network called The CW.
On August 12, 2000, Chris-Craft sold its UPN stations to the Fox Television Stations subsidiary of News Corporation for .5 billion; a deal that was finalized on July 31, 2001, creating a duopoly with Fox O&O KTTV.
Upon being sold to Fox, the Fox Kids weekday block moved to KCOP in the mid-afternoons, only for it to be discontinued nationwide in January 2002.
KCOP partnered with WWOR-TV and MCA TV Entertainment on a two night programming block, Hollywood Premiere Network starting in October 1990.
In 1994, Chris-Craft and its broadcasting subsidiary, United Television, partnered with Viacom's newly acquired subsidiary Paramount Pictures to form the United Paramount Network.
Soon after, the station ran an hour-long morning cartoon block (supplied by DIC Entertainment), but dropped cartoons entirely in September 2006.