 DATE: This episode takes place starting April 1, 1976. This is a  Thursday and yet an episode of _"Saturday Night Live" (1975)_ (qv)  is on TV. Also, Bill Murray (I) (qv) and Chevy Chase (qv) are  both in the one shown, yet they never appeared together on "Saturday  Night Live". Also, the person Sam  leaps into is a stuntman on the set of _Earthquake (1974)_ (qv),  which had been released two years earlier.