Peter Lorre as Stephen Danel

Rochelle Hudson as Lorraine Danel

Robert Wilcox as Mark Sheldon

Don Beddoe as Brand

George E. Stone as Siggy

Kenneth MacDonald as Doctor Rosener

Charles Middleton as Captain Cort

Stanley Brown as Eddie

Earl Gunn as Mitchell

Sam Ash as Ames - Parolee (uncredited)

Raymond Bailey as Mystery Killer (uncredited)

Trevor Bardette as District Attorney (uncredited)

Bruce Bennett as Hazen - Guard (uncredited)

Bernie Breakston as Townsend (uncredited)

Donald Douglas as Department of Justice Official

Richard Fiske as Hale (uncredited)

William Gould as Parole Board Member (uncredited)

Chuck Hamilton as Cop (uncredited)

Howard Hickman as Judge (uncredited)

Al Hill as Clinton (uncredited)

Eddie Laughton as Borgo - Parolee (uncredited)

George McKay as Clerk (uncredited)

Walter Miller as Detective (uncredited)

Edmund Mortimer as Parole Board Member (uncredited)

Forbes Murray as Chairman of Parole Board (uncredited)

Lee Prather as Warden (uncredited)

Addison Richards as Jackson (#46) (uncredited)

Harry Strang as Cop (uncredited)

John Tyrrell as Durkin - Prisoner (uncredited)