Charles Hawkins
Capt. Dyer
Judge Sam Hannum
Gaines
Man in Montage
Mr. Stefani
Captain
Reporter (uncredited)
Mr. Hamilton
Dr. Elton Parkson (uncredited)
Artist (uncredited)
Staff Operator (uncredited)
Hobart Patterson
Colonel Wolfgang Heinrich (as John Wosper)
Ranger Ed Carson
German Sergeant
Morgan
Dave Haller
Bracy
Ship's Officer Weldon (as John Vosburgh)
Undetermined Role (as Jack Vosburgh)
T. Huntington Forbes
