According to Lea Thompson, she found it difficult to perform love scenes with Brett Cullen because he is her close friend in real life. Her difficulty was compounded by the fact that her husband, Howard Deutch was directing her. She had to redub her dialogue in those scenes in post-production.
Before he introduces "Only Sin Deep" in the beginning of the episode, the Cryptkeeper recites the "Mirror, Mirror" chant which breaks a mirror and says that he just bought seven years bad luck. The show lasted for about seven years.
Lea Thompson's character, Sylvia Vane has somewhat long, well manicured, and painted fingernails for most of the filming of this appearance. However, it's interesting that after four months have elapsed, and the consequences of pawnbroker's deal with her are now happening as rapid aging to her face, she no longer has painted longish fingernails - They are now cut and unpolished.
The title comes from the popular expression that "Beauty is only skin deep."