A Navy lieutenant is borrowed by the British to supervise torpedo experiments after one of their scientists is killed.
| Actor | Role |
|---|---|
 Gene KellyLieutenant Bradville | Lieutenant Bradville |
 John JustinLieutenant Wharton | Lieutenant Wharton |
 Bernard LeeLofty Turner | Lofty Turner |
 Jeff RichardsButch Clelland | Butch Clelland |
 Sidney JamesCharlie Badger | Charlie Badger |
 Patric DoonanPetty Officer Herbert | Petty Officer Herbert |
 Ray JacksonSprog Sims | Sprog Sims |
 Fredd WayneShorty Karminsky | Shorty Karminsky |
 Patrick BarrLt. Cdr. Sinclair | Lt. Cdr. Sinclair |
| DDavid OrrHaggis Mackintosh | Haggis Mackintosh |
| PPeter BathurstGeoff | Geoff |