Proof that the ’70s were a very different time, from the edgy and short-lived (four episodes!) “Richard Pryor Show” of 1977. A very dark heavy metal parody that the network allowed to go on for nearly eight minutes. Part KISS, part P-Funk, part something that hadn’t been invented yet. Note Sandra Bernhard in the audience, and the black Nazi dwarf doing the commercial segue at the end.