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