- Jack Holt
- G-Man Martin Galloway, Posing as Bill Donovan
- Wynne Gibson
- Alice Segar, Posing as Mrs. Donovan
- C. Henry Gordon
- Kilgour
- Jack La Rue
- Fred Drake
- Edward Brophy
- Lefty
- William Pawley
- Harry Grady
- Arthur Hohl
- Henchman Blackie
- Robert Emmett O'Connor
- Federal Agent Jim
- William Bakewell
- Dick Withers
- Eleanor Stewart
- Nancy Higbee
- Charles Lane
- Fingers
- Frank Darien
- Dad Higbee
- Lucien Prival
- Franzy
- Richard Tucker
- Agency Chief Conover
- George Cleveland
- Miner
- Wallis Clark
- Federal Agent
- Hal Taliaferro
- Federal Agent
- Frank Ball
- Miner
- Charles Brinley
- Miner
- Frank Ellis
- Miner
