During the dress rehearsal version, Laraine Newman appeared as Connie Conehead during Frank Zappa's "Dancing Fool" musical number, which would lead into the Coneheads sketch. However, she did not appear in the live broadcast during this song.
Frank Zappa did not get along with the cast and crew. During the episode, he purposely mugs to the camera and calls attention to the cue cards. During the good-nights, the cast members stand noticeably far from him.
Sid Vicious was never charged with the murder of his girlfriend. He died less than a year later of overdose.