A British naval officer has a brief affair with a woman in England and never knows that she bears him a son. 20 years later the boy is on a ship under his command when he is tracking a German Raider. When the boy is captured after his ship is sunk, he finds a way to slow the German's progress while a lethal hunt for him goes on.
| Directing | Roy Boulting | Director |
| Writing | Valentine Davies | Writer |
| Writing | C. S. Forester | Writer |
| Sound | Clifton Parker | Music |
| Crew | Gilbert Taylor | Cinematography |
| Sound | Ken Ritchie | Boom Operator |
| Camera | Reg Pope | Clapper Loader |
