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