
Police try to solve a murder on board an ocean liner.

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
Spy Chief (uncredited)

Commander Bryson (uncredited)

Grimson's Aide (uncredited)

Waiter (uncredited)
Aide (uncredited)

Crewman (uncredited)