This weekend, Saturday Night Live celebrates a half century of laughs with SNL50: The Anniversary Sprecial (NBC, Peacock+,Global, STACKTV). The three hour tribute follows a re-broadcast this Saturday night at 11:30 p.m. of the very first episode of the series. Hosted by George Carlin, that premiered Oct. 11, 1975. Twenty five years ago, in 1999,