 Gerald MohrMichael Lanyard / The Lone Wolf | Michael Lanyard / The Lone Wolf |
 Janis CarterCarla Winter | Carla Winter |
 Eric BloreJameson | Jameson |
 John AbbottLal Bara | Lal Bara |
 William B. DavidsonInspector Crane (as William Davidson) | Inspector Crane (as William Davidson) |
 Don BeddoeStonley | Stonley |
 Adele RobertsRita Hale | Rita Hale |
 Mark RobertsDick Hale (as Robert Scott) | Dick Hale (as Robert Scott) |
 Peter WhitneyHarvey Beaumont | Harvey Beaumont |
 Ian WolfeAdam Wheelright | Adam Wheelright |
 Edith EvansonOlga - Carla's Maid | Olga - Carla's Maid |
 Eddie AcuffDetective Jones (uncredited) | Detective Jones (uncredited) |
| EEdward BibyClub Marquis Patron (uncredited) | Club Marquis Patron (uncredited) |
 David BondRoom Service Waiter (uncredited) | Room Service Waiter (uncredited) |
 Symona BonifaceGrand Dame at Airport (uncredited) | Grand Dame at Airport (uncredited) |
 Maurice CassAsst. Hotel Mgr. (uncredited) | Asst. Hotel Mgr. (uncredited) |
 Eddy ChandlerHouse Detective (uncredited) | House Detective (uncredited) |
 Bess FlowersNightclub patron | Nightclub patron |
| GGeorge FordClub Marquis Patron (uncredited) | Club Marquis Patron (uncredited) |
| SStuart HallBystander at Airport (uncredited) | Bystander at Airport (uncredited) |
 Lew HarveyBrooklynese Bystander at Airport (uncredited) | Brooklynese Bystander at Airport (uncredited) |
 Virginia HunterLili - Nightclub Dancer (uncredited) | Lili - Nightclub Dancer (uncredited) |
 Olaf HyttenPrince of Rapur (uncredited) | Prince of Rapur (uncredited) |
| CCy MalisFireman (uncredited) | Fireman (uncredited) |
| JJoe PalmaClub Marquis Waiter (uncredited) | Club Marquis Waiter (uncredited) |
| BBob PerryBystander at Airport (uncredited) | Bystander at Airport (uncredited) |
 Jeffrey SayreWheelright's Assistant Jeweler (uncredited) | Wheelright's Assistant Jeweler (uncredited) |
| BBilly SnyderHotel Night Clerk (uncredited) | Hotel Night Clerk (uncredited) |
 John TyrrellPierre - the Chauffeur (uncredited) | Pierre - the Chauffeur (uncredited) |
| RRobert RyanPlainclothesman (uncredited) | Plainclothesman (uncredited) |
