Dorothy McGuire

Helen

George Brent

Professor Warren

Ethel Barrymore

Mrs. Warren

Kent Smith

Dr. Parry

Rhonda Fleming

Blanche

Gordon Oliver

Steve Warren

Elsa Lanchester

Mrs. Oates

Sara Allgood

Nurse Barker

Rhys Williams

Mr. Oates

James Bell

Constable

Erville Alderson

Dr. Harvey (uncredited)

Ellen Corby

Neighbour (uncredited)

Myrna Dell

Murder Victim (uncredited)

George Holmes

The Killer's 'Shadow' (uncredited)

Stanley Price

Starry-eyed Man (uncredited)

Robert Siodmak

The Killer's 'Eye' (uncredited)

Richard Tyler

Freddy (uncredited)

Charles Wagenheim

Desk Clerk (uncredited)

Larry Wheat

Minister (uncredited)

Nicholas Musuraca

Director of Photography

Dore Schary

Producer

Ethel Lina White

Novel

Mel Dinelli

Screenplay

Albert S. D'Agostino

Art Direction

Harry Gerstad

Editor

Robert Siodmak

Director

Jack Okey

Art Direction

Harry Marker

Editor

Roy Webb

Original Music Composer

Gordon Carveth

Stunts

Vernon L. Walker

Special Effects

Terry Kellum

Sound

Edgar Peterson

Production Assistant

Darrell Silvera

Set Decoration

Harry Scott

Assistant Director

John L. Cass

Sound

C. Bakaleinikoff

Music Director

Chris Crowell

Digital Compositor

Samuel Hoffman

Musician

Fred Fleck

Production Manager

Edward Stevenson

Costume Design