As a tribute to the recently deceased comedian George Carlin, Saturday Night Live will be rerunning their very first episode, which was hosted by Carlin in 1975 under its original name, NBC Saturday Night. ("Saturday Night Live" was the name of a Howard Cosell show at the time). Carlin does three stand-up routines on the show, there are five parody ads, Chevy Chase hosts Weekend Update, the Muppets do a sketch, and Andy Kaufman lip-synchs to the "Mighty Mouse" theme song. It's going to tough crawling back to Andy Samberg after this one. [Tonight, HBO will air two Carlin specials, 1977's "George Carlin at USC" and 1978's "George Carlin Again!" starting at 8 p.m.]