Inc. In 1982, with the launch of the overnight news program CBS News Nightwatch, KWTV became the first television station in the Oklahoma City market to maintain a 24-hour programming schedule on weekdays (KTVY had begun maintaining a 24-hour schedule on Fridays and Saturdays in 1978); the station would not adopt a 24-hour schedule regularly until the launch of CBS News Up to the Minute in September 1992. Ownership of KWTV would transfer to the familial heirs of John Griffin—widow Martha Watson Griffin (who also assumed her husband's post as KWTV board chairman), and sons John W. and David Griffin (both of whom would become KWTV executives in 1990, with David eventually taking over as President of Griffin Communications in 2001)—after he died on July 26, 1985, at the age of 62. That year, KWTV began producing Bingomania (a co-production with Dayton, Ohio-based Prijatel Productions), a half-hour bingo game show—developed as a relaunch of the local program $20,000 Jackpot Bingo, which premiered on the station in September 1985—that was briefly available in limited national syndication through licensing deals with individual stations; after a two-year run, the program was cancelled in 1987. On February 3, 1997, the station—which had branded itself as "TV-9" since 1981—modified its general branding to "KWTV 9" full-time and retitled its newscasts from Newsline 9 to simply News 9, which would be extended to a full-time generalized brand in May 2001. On October 25, 2010, KWTV became the first television station in the Oklahoma City market to carry syndicated programming and advertisements inserted during local commercial breaks (including station and network promos) in high definition. On September 29, 2014, Griffin purchased MyNetworkTV affiliate KSBI (channel 52) from Oklahoma City-based Family Broadcasting Group (owned by a consortium led by former KWTV weekend evening meteorologist Brady Brus, which—under its former name, Christian Media Group—outbid Griffin to purchase KSBI in 2001) for $33.5 million. The transaction was finalized on December 1, 2014, making KWTV and KSBI became the fourth commercial television duopoly in the Oklahoma City market. KSBI subsequently migrated its operations from its studio facility on North Morgan Road in Yukon, into KWTV's Kelley Avenue studios on December 6 of that year. On March 1, 2017, in a move mirroring similar rebrandings made by Fox Television Stations for its MyNetworkTV owned-and-operated and independent stations around this timeframe, Griffin extended KWTV's branding to KSBI under the "News 9 Plus" moniker;