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