Cast
George Cleveland
Simms, the Steward
Astrid Allwyn
Lila Kane
Edwin Maxwell
Major Pope
Gustav von Seyffertitz
Inspector Von Kessling
Ralph Lewis
Prof. Grimson
Howard Hickman
Dr. Howard
Noah Beery
Capt. John Holling
Gordon De Main
Commander Bryson (uncredited)
George Nash
Waiter (uncredited)
Slim Whitaker
Crewman (uncredited)
Cornelius Keefe
First Officer Cliff Rogers
Zeffie Tilbury
Granny Plimpton
George 'Gabby' Hayes
Joe, the Watchman
Olaf Hytten
Grimson's Aide (uncredited)