 Boris KarloffJohn Ellman | John Ellman |
 Ricardo CortezNolan | Nolan |
 Edmund GwennDr. Evan Beaumont | Dr. Evan Beaumont |
 Marguerite ChurchillNancy | Nancy |
 Warren HullJimmy | Jimmy |
 Barton MacLaneLoder | Loder |
 Henry O'NeillDistrict Attorney Werner | District Attorney Werner |
 Joe KingJudge Roger Shaw | Judge Roger Shaw |
 Addison RichardsPrison Warden | Prison Warden |
 Paul HarveyBlackstone | Blackstone |
 Robert StrangeMerritt | Merritt |
 Joe Sawyer'Trigger' Smith | 'Trigger' Smith |
 Eddie Acuff'Betcha' | 'Betcha' |
 Kenneth HarlanStephen Martin | Stephen Martin |
 Miki MoritaLoder's Butler Sako | Loder's Butler Sako |
| RRuth RobinsonMrs. Shaw | Mrs. Shaw |
 George BerangerNolan's Butler (uncredited) | Nolan's Butler (uncredited) |
 Wade BotelerCellist's Guard (uncredited) | Cellist's Guard (uncredited) |
 Frank DarienCemetery Caretaker (uncredited) | Cemetery Caretaker (uncredited) |
 Edward GarganGuard Sitting Outside Warden's Office (uncredited) | Guard Sitting Outside Warden's Office (uncredited) |
 Crauford KentBritish Radio Announcer (uncredited) | British Radio Announcer (uncredited) |
 Milton KibbeeReporter (uncredited) | Reporter (uncredited) |
 William H. O'BrienJuror (uncredited) | Juror (uncredited) |
 Paul PanzerMan in Courtroom (uncredited) | Man in Courtroom (uncredited) |
 Leo WhiteMan in Courtroom (uncredited) | Man in Courtroom (uncredited) |
 Tom BrowerNot listed | Not listed |
 James P. BurtisNot listed | Not listed |
| EEdwin J. CarlieNot listed | Not listed |
 Glen CavenderNot listed | Not listed |
| LLucille CollinsNot listed | Not listed |
