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.
Genres:
Stanley Ridges as Prof. George Kingsley / Red Cannon
Boris Karloff as Dr. Ernest Sovac
Bela Lugosi as Eric Marnay
Anne Nagel as Sunny Rogers
Anne Gwynne as Jean Sovac
Virginia Brissac as Mrs. Margaret Kingsley
Edmund MacDonald as Frank Miller
Paul Fix as William Kane
Murray Alper as Bellhop
Jack Mulhall as Bartender
Raymond Bailey as Louis Devore
Joe King as Chief of Police
John Kelly as Taxi Driver
Jessie Arnold as Nurse
Elfriede Borodin as 2nd Nurse
Tommy Conlon as Student
Franco Corsaro as Club Maitre d' (uncredited)
James Craig as Reporter Ernst Gives Notes To
Kernan Cripps as Detective
Eddie Dunn as Det. Farnow
Edward Earle as Detective
Harry Hayden as Prison Doctor
Frank Jaquet as Fat Man in Bar
Ellen Lowe as Midtown Hotel Maid
Jerry Marlowe as Midtown Hotel Clerk
Jerry Marlowe as Cabbie
Wallace Reid Jr. as Student
William Ruhl as G-Man
Frank Sheridan as Prison Chaplain
Edwin Stanley as Dr. Warner
Harry Tenbrook as Cabbie
Emmett Vogan as Det. Carpenter
Russell Wade as Student
Dave Willock as Student
Victor Zimmerman as G-Man
Robert Morgan as Hotel Associate
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