Story of how two youngsters round up crooks planning to blow up the British fleet off Gibraltar.
| Actor | Role |
|---|---|
 George ColeGobo | Gobo |
| NNati BandaPilar Ellis | Pilar Ellis |
| RRoy SavageJimmy Sutton | Jimmy Sutton |
| PPatrick BoxillMr Palmer | Mr Palmer |
 Peter CopleyHis Excellency | His Excellency |
| WWilliam PatrickLt. Com. Collier | Lt. Com. Collier |
| JJohn OcelloMatty | Matty |
 Bill ShineCrony | Crony |
 Evelyn RobertsRear Admiral McCormack | Rear Admiral McCormack |
| HHarold SiddonsNavy Intelligence Officer | Navy Intelligence Officer |
 John WelshArmy Intelligence Officer | Army Intelligence Officer |
 Julian SomersRAF Intelligence Officer | RAF Intelligence Officer |
| LLuis EllulOrange Boy | Orange Boy |
| CCarla ChallonerLittle Girl | Little Girl |
| MMarcus SimpsonPetty Officer Ellis | Petty Officer Ellis |
| WWilfred WalterRear Admiral Vinson | Rear Admiral Vinson |