Lieutenant Tom Grayson
Lieutenant Frank Corby
Janet Warfield
General White
Ben Warfield
Colonel Grayson
Crenshaw
Benson
Professor Gould
Johnson, 'Aurora' Crewman
Lin Wing
Sam Hedges, the Gardener
Parker--Sub Crewman
Henchman Wilson
Henchman Ellis
Henchman Marco
Todd--Submarine Captain
Gehorda Outlaw (uncredited)
'Wing' Henchman (uncredited)
Mikichan (uncredited)
King (uncredited)
Thompson (uncredited)
The Lightning (uncredited)
Marine Guard at Burton Street (uncredited)
General Snell (uncredited)
Dirigible Radioman (uncredited)
Jacobs (uncredited)
Lieutenant of the 'Pawnee' (uncredited)
Bearded Sailor (uncredited)
Sam (uncredited)
The Lightning (voice) (uncredited)
Jamison (uncredited)
Sgt. Bennett (uncredited)
Marine in Shanghai (uncredited)
Dirigible Captain (uncredited)
Renault (uncredited)
Marine (uncredited)