This is a remake of the short film The Secret Cinema (1966), which was also written and directed by Paul Bartel.
There is a poster for The Snake Pit (1948) in the psychiatrist Dr. Shreck's office. This is an in-joke, as the film tells the story of a woman, Virginia Stuart Cunningham, who finds herself in an insane asylum and cannot remember how she got there.
Barry Dennen: As the News Dealer. Dennen previously played the psychiatrist in The Secret Cinema (1966).