A CARGO OF THRILLS ON A SEA OF MYSTERY
Police try to solve a murder on board an ocean liner.
Spy Chief (uncredited)
Commander Bryson (uncredited)
Grimson's Aide (uncredited)
Waiter (uncredited)
Aide (uncredited)
Crewman (uncredited)
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
