Phyllis Thaxter
Joan Alris Ellis
Edmund Gwenn
Dr. Bergson
Henry H. Daniels Jr.
Bob Arnold
Addison Richards
John Ellis
Kathleen Lockhart
Mrs. Ellis
Francis Pierlot
Dr. George Wilton
Sharon McManus
Small Girl
Gladys Blake
Glenda
Will Wright
Mr. Herkheimer
Stephen McNally
Eric Russell (as Horace McNally)
Oscar O'Shea
Capt. O'Malley
Minor Watson
Governor
Virginia Brissac
Martha--Governor's Wife
Audrey Totter
Karen (voice)
Harry Strang
Prison Guard
Forbes Murray
Judge
Tom Coleman
Juror (uncredited)
Clancy Cooper
Cop (uncredited)
Eddie Dunn
Prison Janitor (uncredited)
George Meader
Juror (uncredited)
Howard M. Mitchell
Juror (uncredited)
Forbes Murray
Judge (uncredited)
Harry Seymour
Prison Technician (uncredited)
Harry Strang
Prison Guard (uncredited)
Forrest Taylor
Prosecutor (uncredited)
Audrey Totter
Karen (voice) (uncredited)
Anthony Warde
Masher on Street (uncredited)
Paul Weigel
The Governor's Butler (uncredited)
Crane Whitley
Warden Clark (uncredited)
Crew
Arch Oboler
Director
Arch Oboler
Adaptation
Arch Oboler
Story
Jerry Bresler
Producer
Bronislau Kaper
Original Music Composer
Charles Salerno Jr.
Director of Photography
Harry Komer
Editor
Arch Oboler
Writer
Malcolm Brown
Art Direction
Cedric Gibbons
Art Direction
Edwin B. Willis
Set Decoration
Jack Gertsman
Unit Manager
Dave Ragin
Camera Operator