How to Make a Monster is a 1958 American horror film drama that is notable for its inclusion of props and studios that created actual sci-fi horror movies.

The film is a follow-up to both I Was a Teenage Werewolf and I Was a Teenage Frankenstein. Like Teenage Frankenstein, a black-and-white film that switches to color in its final moments, How to Make a Monster was filmed in black-and-white and only the last reel (the fire scene finale) is in full color.

https://en.wikipedia.org/wiki/How_to_Make_a_Monster_(1958_film)