On this day in history, May 22, 1992, Johnny Carson makes his final appearance on 'The Tonight Show'
Johnny Carson, the king of late-night television, hosted his final episode of "The Tonight Show" on this day in history, May 22, 1992, after a 30-year run. Carson conducted about 22,000 interviews during his tenure and was seen by more people on more occasions than anyone else in U.S. television history, according to the Vancouver Sun.