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