Doctor Gogol
Yvonne Orlac
Stephen Orlac
Reagan
Marianne (scenes deleted)
Marie
Rollo
Prefect Rosset
Dr. Wong
Françoise
Henry Orlac, Stephen Orlac's Stepfather (Uncredited)
Pierre, Henry Orlac's Clerk (Uncredited)
Lavin, Waxwork Proprietor (Uncredited)
Charles, Theatre Official (Uncredited)
Varsac, Fingerprint Expert (Uncredited)
Dr. Marbeau (Uncredited)
Suzanne (Uncredited)
Raoul (Uncredited)
Stage Doorman (Uncredited)
Autograph Seeker on Train (Uncredited)
An insane surgeon's obsession with an actress leads him to replace her wounded pianist husband's hands with the hands of a knife murderer--hands which still have the urge to throw knives.