Casting
George O'Brien
David Lynch / Motano
Janet Chandler
Betty Summers / Betty Brown
Marion Burns
Helen Sheppard
Arthur Pierson
Robert Summers
Onslow Stevens
Calvin Brown
Emmett Corrigan
Colonel Horace Summers
Bert Hanlon
Dennis Epstein
Edmund Breese
Sam Lynch
Chief John Big Tree
Indian (uncredited)
Stanley Blystone
Major (uncredited)
Ed Brady
Substitute Engineer
Fred Church
Undetermined Role