powered by AFI
How to Make a Monster uses characters from two earlier American International Picture films, I Was a Teenage Frankenstein and I Was a Teenage Werewolf, both released in 1957 (see below). Gary Conway, who plays "Tony Mantell" and the Frankenstein character in How to Make a Monster was also the star of I Was Teenage Frankenstein. Gary Clarke, who plays "Larry Drake" and the werewolf character in How to Make a Monster did not appear in I Was a Teenage Werewolf, which starred Michael Landon.
American International Picture's name and posters from I Was a Teenage Frankenstein and I Was a Teenage Werewolf are displayed prominently in one scene in How to Make a Monster. The last ten minutes of the film are presented in color in order to utilize masks from several AIP releases designed by makeup artist Paul Blaisdell. According to modern sources, several of these masks were badly damaged during the fire sequence.