- James Newill
- Sgt. Renfrew
- Louise Stanley
- Madeleine Lewis
- Dewey Robinson
- Uncle Dinwiddie
- William Pawley
- Morgan
- Joe De Stefani
- Prof. Burton Lewis
- Jim Farley
- Inspector Warner
- Dave O'Brien
- Constable Kelly
- Karl Hackett
- Hawthorne
- Ted Adams
- Gary - Henchman
- Dwight Frye
- Speavy
- Jack Rube Clifford
- Whispering Smith
- Bob Terry
- Hutchins - Henchman
- Kenne Duncan
- Brownie - Henchman
- Eddie Fetherston
- Buzz Murphy - Pilot
- Don Brodie
- Radio Operator
- Earl Douglas
- Butch - Henchman
- Harry Harvey
- Mechanic Greaseball
- 'Snub' Pollard
- Pa
- Dorothy Vernon
- Ma
