- Victor Jory
- Lamont Cranston
- Veda Ann Borg
- Margot Lane
- Roger Moore
- Harry Vincent
- Robert Fiske
- Stanford Marshall
- John Paul Jones
- Mr. Turner
- Jack Ingram
- Flint
- Chuck Hamilton
- Roberts
- Edward Peil Sr.
- Cardona
- Frank LaRue
- Ralph Weston
- Philip Ahn
- Wu Yung
- Griff Barnett
- Stephen Prescott
- John Barton
- Man on Crutches
- Steve Benton
- Police Officer
- Phil Bloom
- Henchman
- Dick Botiller
- Green
- Budd Buster
- Beggar Giving Cranston Tip on Radio Shop
- Joe Caits
- Radio Shop Henchman
- Horace B. Carpenter
- Hijacked Car Driver
- Hal Cooke
- Mr. Kent
- Richard Cramer
- Voice of 'The Black Tiger'
- Kernan Cripps
- Shipyard Cop / Courtroom Cop (uncredited)
- Joe Devlin
- Henchman
- Charles Dorety
- Henchman
- Lester Dorr
- Henchman
- Franklyn Farnum
- Sparks
- Eddie Fetherston
- Williams
- Charles K. French
- Joseph Rand
- Kit Guard
- Clark
- Frank Hagney
- Cranston's Kidnapper
- Gordon Hart
- Albert Hill
- Lloyd Ingraham
- Judge
- Johnny Kascier
- Henchman
- Jack Kennedy
- Cop at Oriental Bazaar
- Charles King
- Russell
- William Lally
- Policeman
- Rex Lease
- Garage Henchman
- Edward LeSaint
- Dr. Grant
- Tom London
- Hijacked Truck Driver
- Jack Low
- Mallory
- Sam Lufkin
- Kirk
- Murdock MacQuarrie
- Richards
- Charles McAvoy
- Police Guard at Rand's
- Charles McMurphy
- Police Dispatcher
- Lew Meehan
- Police Radio Dispatcher
- Frank Mills
- Henchman
- George Morrell
- Newspaper-Seller
- Jack Perrin
- Plane Mechanic
- Bob Reeves
- Police Officer
- Jack Rice
- Taylor
- Constantine Romanoff
- Harvey
- Dick Rush
- Policeman
- Marin Sais
- Nurse Plunkett
- Lewis Sargent
- Henchman
- Cy Schindell
- Streeter
- Lee Shumway
- Frank Milford
- Charles Sullivan
- Counterman at Black Ship Café
- Harry Tenbrook
- Adams
- Al Thompson
- Henchman
- George Turner
- Jimmy
- Duke York
- Henchman
- Bert Young
- Henchman
