During a horrific storm at sea, the crew realizes that there is a murderer among them who is killing them off one by one.
| Actor | Role |
|---|---|
 Bela LugosiAnton Lorenzen | Anton Lorenzen |
 Shirley GreySarah Briggs | Sarah Briggs |
 Arthur MargetsonCapt. Benjamin Briggs | Capt. Benjamin Briggs |
 Edmund WillardToby Bilson | Toby Bilson |
 Dennis HoeyTom Goodschild | Tom Goodschild |
 George MozartTommy Duggan | Tommy Duggan |
 Johnnie SchofieldPeter Tooley | Peter Tooley |
| GGunner MoirPonta Katz | Ponta Katz |
 Ben WeldenBoas 'Sailor' Hoffman | Boas 'Sailor' Hoffman |
| CClifford McLaglenCapt. Jim Morehead | Capt. Jim Morehead |
 Bruce GordonOlly Deveau | Olly Deveau |
 Gibson GowlandAndy Gilling | Andy Gilling |
 Terence de MarneyCharlie Kaye | Charlie Kaye |
| EEdgar PierceArian Harbens | Arian Harbens |
| HHerbert CameronVolkerk Grot | Volkerk Grot |
| WWilfred EssexHoratio Sprague | Horatio Sprague |
 James CarewJames Winchester | James Winchester |
| MMonti DeLylePortunato | Portunato |
 Alec FraserCmdr. Mahon | Cmdr. Mahon |
| LLucius BlakeSailor | Sailor |
| CCharles MortimerAttorney General | Attorney General |
| GGraham SouttenJack Sampson | Jack Sampson |
| JJ.B. WilliamsThe Judge | The Judge |