How To Make A Monster 1958

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.
It was produced and written by Herman Cohen, directed by Herbert L. Strock, and starring Gary Conway, Robert H. Harris, Paul Brinegar, Morris Ankrum, Robert Shayne, and John Ashley. The film was released by American International Pictures as a double feature with Teenage Caveman.
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.
Pete Dumond, chief make-up artist for 25 years at American International Studios, will be fired after the studio is purchased by NBN Associates. The new management from the East, Jeffrey Clayton and John Nixon, plan to make musicals and comedies instead of the horror pictures for which Pete has created his remarkable monster make-ups and made the studio famous. (The new owners show Pete one of their new rock musical numbers on stage which features real-life singing superstar John Ashley.) In retaliation, Pete vows to use the very monsters these men have rejected to destroy them in revenge.
By mixing a numbing ingredient into his foundation cream and persuading the young actors that their careers are through unless they place themselves in his power, he hypnotizes both the unsuspecting Larry Drake and Tony Mantell (who are playing the characters the Teenage Werewolf and the Teenage Frankenstein, respectively, in the picture Werewolf Meets Frankenstein, currently shooting on the lot).
Through hypnosis, Pete urges Larry, in Teenage werewolf make-up, to kill Nixon in the studio projection room. Later, he orders the unknowing Tony, in Teenage Frankenstein make-up, to attack Clayton and choke him to death after he arrives home at night in his 1958 Lincoln convertible. Next day, studio guard Monahan, an amateur detective, stops in at the make-up room. He shows Pete and Rivero, Pete's make-up assistant, his little black book in which he has jotted down many interesting facts, such as the late time (9:12PM) Pete and Rivero checked out the night of Jeffrey Clayton's murder. He explains he hopes to work his way up to chief of security on the lot. Apprehensive, Pete makes himself up as a terrifying split-faced Caveman, one of his own creations and kills Monahan in the studio commissary while Monahan makes his rounds that night.
Richards, the older guard, sees and hears nothing of the struggle, but discovers the missing Monahan's body. Police investigators uncover two clues: a maid, Millie, describes Frankenstein's monster (Tony, in make-up), who struck her down as he fled from the scene of Clayton's murder, and the police laboratory technician discovers a peculiar ingredient in the make-up left on Clayton's fingernails from etc.