Gladys Hill, for years John Huston's personal assistant and co-writer, contributed greatly to the preparation of the final shooting script for Phobia uncredited. She was given a credit as "assistant to Mr. Huston".
Melvyn Hill (no relation to Gladys) was also a major contributor to the development of the script. Professor Hill, a psychologist whose knowledge about the criminally insane as well as his credible creative writing skills also advised Mr. Huston with the preparation of the script. Uncredited.
Lisa Langlois' first nude scene.