Late Night is an American late-night talk and variety show airing on NBC since 1982.Four men have hosted Late Night: David Letterman (1982–93), Conan O'Brien (1993–2009), Jimmy Fallon (2009–14), and Seth Meyers (2014–present).He moved his show over to CBS virtually unchanged, taking most of the staff, skits, and comedy formats with him.
The show, and O'Brien, slowly improved through experience, and the show's ratings gradually increased to a level which allowed O'Brien to secure a longer contract, and not have to worry about cancellation.
On March 1, 1994, Letterman appeared on Late Night as O'Brien's only guest, marking the only time that Letterman has appeared on an NBC talk show since his departure for CBS.
The network aired complete shows from various years five days per week from 1993 until 1996.
Then Trio (owned by NBC) picked up reruns and showed them from 2002 until the channel went off the air in 2005.
Letterman was bitterly disappointed and angry at not having been given The Tonight Show job, and, on Carson's advice, walked away from NBC after eleven years on Late Night.
CBS signed Letterman to compete directly opposite Leno's Tonight Show at PM.Each iteration of the show was built around its host, and maintained distinct identities aside from the title.The longest-serving host to date was O'Brien, who hosted Late Night with Conan O'Brien for 16 years, from September 1993 to February 2009.The show was first offered to Dana Carvey and Garry Shandling, both of whom turned it down.Saturday Night Live producer Lorne Michaels' company, Broadway Video, replaced Carson Productions and Letterman's Worldwide Pants as the show's co-production company, in partnership with NBC Studios.The crowd for the first show mainly consisted of family members of the crew of the show so as to ensure a positive reception.