
University professor George Kingsley is struck by gangsters while crossing the street, leaving him with brain damage and one of the gangsters, Cannon, paralyzed. Kingsley's friend Dr. Sovac attends to both men, and when Cannon offers him a reward for aiding his recovery, Kovac transplants part of Cannon's brain into the dying Kingsley's skull, creating a dual personality.

Stanley Ridges
Prof. George Kingsley / Red Cannon

Boris Karloff
Dr. Ernest Sovac

Bela Lugosi
Eric Marnay

Anne Nagel
Sunny Rogers

Anne Gwynne
Jean Sovac

Virginia Brissac
Mrs. Margaret Kingsley

Edmund MacDonald
Frank Miller

Paul Fix
William Kane

Murray Alper
Bellhop

Jack Mulhall
Bartender

Raymond Bailey
Louis Devore

Joe King
Chief of Police

Logan
Logan

Come, Sweet Death
Come, Sweet Death

Sherlock Holmes
Sherlock Holmes

The Philadelphia Experiment
The Philadelphia Experiment

Don't Be a Menace to South Central While Drinking Your Juice in the Hood
Don't Be a Menace to South Central While Drinking Your Juice in the Hood

Reklaw
Reklaw

Veronica Guerin
Veronica Guerin

In the Heat of the Night
In the Heat of the Night

The First Purge
The First Purge

The Invisible Man
The Invisible Man

The Abandoned
The Abandoned

Night Shift
Night Shift