A group of adventurers refloat a WWII German submarine and prepare to use it to pull a very large heist; The Queen Mary which they plan to rob on the high seas.
| Actor | Role |
|---|---|
 Frank SinatraMark Brittain | Mark Brittain |
 Virna LisiRosa Lucchesi | Rosa Lucchesi |
 Anthony FranciosaVic Rossiter | Vic Rossiter |
 Richard ConteTony Moreno | Tony Moreno |
 Alf KjellinEric Lauffnauer | Eric Lauffnauer |
 Errol JohnLinc Langley | Linc Langley |
 Murray MathesonCaptain | Captain |
 Reginald DennyMaster-at-Arms | Master-at-Arms |
 John WarburtonBank manager | Bank manager |
 Lester MatthewsDoctor | Doctor |
 Val AveryTrench | Trench |
| GGilchrist StuartOfficer #1 | Officer #1 |
 Ronald LongOfficer #2 | Officer #2 |
 Leslie BradleyOfficer #3 | Officer #3 |
 Arthur Gould-PorterOfficer #4 | Officer #4 |