Closing scene: The Metro theatre marque is playing Robert Redford's most recent movie from 1972, The Candidate. Time stamp: 48:46 .
The character Sonny Lane in the episode is incorrectly called 'Jaimie Lane' in the closing credits.
Four actors in this episode also appeared in Star Trek (1966) : Phillip Pine, Lawrence Montaigne, Carl Byrd, and Ken Lynch.
In the motel, Steve Keller (Michael Douglas) says he's 28 years old and that he just had a birthday. In fact, Douglas turned 28 on September 25, 1972, five days before the episode aired.