Générique complet
Mystery Liner
Noah Beery
Capt. John Holling
Astrid Allwyn
Lila Kane
Edwin Maxwell
Major Pope
Gustav von Seyffertitz
Inspector Von Kessling
Ralph Lewis
Prof. Grimson
Cornelius Keefe
First Officer Cliff Rogers
Zeffie Tilbury
Granny Plimpton
BH
Boothe Howard
Capt. Downey
Howard Hickman
Dr. Howard
JS
Jerry Stewart
Edgar Morton
JS
John M. Sullivan
Watson
George 'Gabby' Hayes
Joe, the Watchman
George Cleveland
Simms, the Steward
RB
Raymond Brown
Spy Chief (uncredited)
Gordon De Main
Commander Bryson (uncredited)
Olaf Hytten
Grimson's Aide (uncredited)
George Nash
Waiter (uncredited)
HS
Harry Schultz
Aide (uncredited)
Slim Whitaker
Crewman (uncredited)
