|
| Cast |
 |
|
| L/Seaman James Hobson, on hydrophones | Eric PORTMAN |
| Lt Freddie Taylor, captain | John MILLS |
| CPO Dickie Dabbs, coxwain | Reginald PURDELL |
| CPO Mike Corrigan, torpedo gunner's mate | Niall MacGINNIS |
| Lt Brace, first officer | Louis BRADFIELD |
| Lt Johnson, third officer | Ronald MILLAR |
| Lt Gordon, navigating officer | Jack WATLING |
| CPO Duncan, chief engine room artificer | Caven WATSON |
| L/Seaman 'Tug' Wilson, ldg torpedo oprtr | Leslie WESTON |
| 'Canada', periscope operator | Norman WILLIAMS |
| 'Spud', torpedo operator | Lionel GROSE |
| 'Oxford', helmsman | David PEEL |
| 'Flunkey', steward | Philip GODFREY |
| 'Pincher', cook | Robert WILTON |
| officer (uncredited) | Ian FLEMING |
| Drake (uncredited) | John SALEW |
| man asking for cigarettes (uncredited) | Ian WILSON |
| Ethel Dabbs (uncredited) | Joan HOPKINS |
| Mrs Metcalfe (uncredited) | Marie AULT |
| Sidney Biggs (uncredited) | Frederick BURTWELL |
| Mrs Alice Hobson (uncredited) | Josephine WILSON |
| Mrs Dabbs (uncredited) | Beatrice VARLEY |
| Charlie (uncredited) | John SLATER |
| German submarine officer (uncredited) | Victor BEAUMONT |
| German submarine captain (uncredited) | Walter GOTELL |
| Humphries (uncredited) | Philip FRIEND |
| (uncredited) | Kenneth EVANS |
| (uncredited) | Charles RUSSELL |
| (uncredited) | Gerik SCHJELDERUP |
| (uncredited) | Mike JOHNSON |
| (uncredited) | Franklyn BENNETT |
| (uncredited) | Bryan POWLEY |
| (uncredited) | Merle TOTTENHAM |
| (uncredited) | Joan STERNDALE-BENNETT |
| (uncredited) | George CROSS |
| (uncredited) | John REDMOND |
| (uncredited) | Johnnie SCHOFIELD |
|
| Credits |
|
|
| Directed by | Anthony ASQUITH |
| Production Company | Gainsborough Pictures |
| Produced by | Edward BLACK |
| In Charge of Production | Maurice OSTRER |
| Production Manager (uncredited) | Fred GUNN |
| Continuity (uncredited) | Jo HARCOURT |
| Story and Screen Play | J.B. WILLIAMS |
| | Val VALENTINE |
| Screenplay (uncredited) | Frank LAUNDER |
| Photography | Jack COX |
| Camera Operator (uncredited) | Phil GRINDROD |
| 2nd Camera Operator (uncredited) | George STEVENS |
| Focus Puller (uncredited) | David HARCOURT |
| Clapper Loader (uncredited) | John GUNN |
| Backings (uncredited) | E. LINDEGAARD |
| Special Effects (uncredited) | Jack WHITEHEAD |
| Editing | R.E. DEARING |
| Cutting | Charles SAUNDERS |
| Art Director | Walter MURTON |
| Draughtsmen (uncredited) | Maurice CARTER |
| | Lawrence BROADHOUSE |
| | John GOW |
| Musical Director | Louis LEVY |
| Sound Supervision | B.C. SEWELL |
| Sound recording (uncredited) | Sid WILES |
| Sound Camera Operator (uncredited) | Edith KANTUREK |
| Boom Operator (uncredited) | Charles WHEELER |
| Made at | Shepherd's Bush Studios |
