Capt. John Holling

Lila Kane

Major Pope

Inspector Von Kessling

Prof. Grimson

First Officer Cliff Rogers

Granny Plimpton

Capt. Downey

Dr. Howard

Edgar Morton

Watson

Joe, the Watchman

Simms, the Steward

Spy Chief (uncredited)

Commander Bryson (uncredited)

Grimson's Aide (uncredited)

Waiter (uncredited)

Aide (uncredited)

Crewman (uncredited)

Director

Producer

Screenplay

Novel

Director of Photography

Original Music Composer