- Kane Richmond
- Jim Marsden
- Kay Aldridge
- Patricia Harding
- Roy Barcroft
- Carter / Kane
- Clancy Cooper
- Yank
- Marshall Reed
- Tommy
- Oscar O'Shea
- John Galbraith [Chs. 1, 7, 15]
- Forrest Taylor
- Dr. Oliver Harding [Chs. 1-4]
- Hal Taliaferro
- Lawson [Ch. 1, 6-7]
- Edward Keane
- Fredrick Vorhees [Ch. 1]
- George J. Lewis
- Dranga
- Kenne Duncan
- Gregg
- Bud Geary
- Snell
- Robert Homans
- Port Captain [Chs. 1, 15]
- Duke Green
- Constable #2 [Chs. 1,7] / Kassim [Ch. 2] / Henchman Neville [Chs. 6-7] / Cabin thug [Ch. 8] / Radio bomb thug [Ch. 10] Henchman Ronson [Chs. 14-15]
- Dale Van Sickel
- Gold Theft Thug [Ch. 12] / Sailor #1[Chs. 13-14]
- Tom Steele
- Constable #1 [Chs. 1, 7] / Store Thug [Ch. 2] / Radio Bomb Thug [Ch. 10] / Henchman Bert Mead [Chs. 14-15]
- Edward Coch
- Tamil [Chs. 10,11]
- Dick Botiller
- Constable at Vorhees' Office [Ch. 1]
- John Casey
- Native
- Fred Cordova
- Constable at Cafe [Ch. 7]
- Russell Custer
- Barfly
- John Daheim
- Henchman Dunning [Ch. 6]
- Jerado Decordovier
- Native
- Harry Denny
- Barfly
- Herbert Evans
- Barfly [Chs. 1, 7]
- J.C. Fowler
- Barfly
- Joe Garcio
- Henchman
- Fred Graham
- Mine Thug [Chs. 3, 15] / 2nd Bartender [Chs. 6-7] (uncredited)
- Kit Guard
- Barfly
- Charles Hayes
- Man in Suit at Bar [Ch. 1]
- Carey Loftin
- Cave Thug #2 [Ch. 7]
- Jack O'Shea
- Second Ambush Thug [Ch. 3]
- Satini Pualoa
- Native
- Max Reid
- Native
- Jay Silverheels
- Native [Chs. 11-12]
- Pietro Sosso
- Priest [Ch. 1]
- Ken Terrell
- Taola, Tobacco Peddler [Ch. 7] / Sailor [Chs. 13-14] (uncredited)
- Nick Thompson
- Native Chief [Chs. 10-11]
- Robert J. Wilke
- 1st Bartender [Ch. 1]
- Harry Wilson
- Barfly [Ch. 1]
- Bud Wolfe
- Cave Thug #1 [Ch. 7]
