A Cat in the Brain

Cat in the Brain is a 1990 Italian horror film written and directed by Lucio Fulci. Fulci stars as a fictionalized version of himself, a tortured horror filmmaker who is driven by the violent visions that he experiences both behind the camera and off the set. Feeling like he's losing his grip on reality and disturbed by murderous fantasies, Fulci consults a psychotherapist, who is secretly a serial killer and using hypnosis, exploiting the director's vulnerabilities to his own murderous ends.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.