The Black Sleep

Basil Rathbone

Sir Joel Cadman

Herbert Rudley

Dr. Gordon Ramsay

Patricia Blair

Laurie Munroe

Akim Tamiroff

Odo the Gypsy

Phyllis Stanley

Daphne

Lon Chaney Jr.

Dr. Munroe, aka Mungo

Bela Lugosi

Casimir

John Carradine

Bohemund

George Sawaya

Sailor-Subject

Tor Johnson

Mr. Curry

Sally Yarnell

Female Subject

Peter Gordon

Sgt. Steele

Claire Carleton

Carmona Daly

Clive Morgan

Roundsman Blevins (uncredited)

Louanna Gardner

Angelina Cadman

Aubrey Schenck

Prison Coroner's Clerk (uncredited)