RCMP Sgt. Renfrew

James Newill

Madeleine Lewis

Louise Stanley

Whispering Smith

Jack Rube Clifford

Henchman Hutchins

Bob Terry

Henchman Brownie

Kenne Duncan

Pilot Buzz Murphy

Eddie Fetherston

Radio Operator

Don Brodie

Henchman Butch

Earl Douglas

Mechanic Greaseball

Harry Harvey

Pa, Man in Nightshirt

Harry 'Snub' Pollard

Ma

Marin Sais

Uncle Dinwiddie

Dewey Robinson

Morgan

William Pawley

Professor Burton Lewis

Joe De Stefani

Inspector Warner

Jim Farley

Constable Kelly

Dave O'Brien

Hawthorne

Karl Hackett

Henchman Gary

Ted Adams

Speavy

Dwight Frye

Director

Ralph Staub

Assistant Director

Ben Chapman

Screenplay

Edward Halperin

Novel

Laurie York Erskine