Beverly Garland

Joyce Webster, aka Jane Marvin

Bruce Bennett

Dr. Eric Lorimer

Lon Chaney Jr.

Manon

George Macready

Dr. Mark Sinclair

Frieda Inescort

Mrs. Lavinia Hawthorne

Richard Crane

Paul Webster

Douglas Kennedy

Dr. Wayne McGregor

Bill Bradley

Patient 'Number Six' (uncredited)

Hal K. Dawson

Conductor

Dudley Dickerson

Porter

John Frederick

1st Male Nurse (uncredited)

Ruby Goodwin

Louann

Ken Kane

Third Male Nurse (uncredited)

Boyd Stockman

Alligator-headed Paul

Vince Townsend Jr.

Toby

Lee Warren

2nd Male Nurse (uncredited)