 | Hugh Williams als Nicholas Talbot |
 | Greta Gynt als Phillipa Shelley |
 | Marius Goring als Sidney Fleming |
 | Francis L. Sullivan als Prosecuting Counsel |
 | Henry Edwards als Inspector Archer |
 | Rosalie Crutchley als Elizabeth Rusman |
 | Marjorie Mars als Joan Newcombe |
 | Maurice Denham als Defense Counsel |
 | Margaret Boyd als Mrs. Turnbull |
| Leo Bieber als Parone, Orchestra Conductor |
| Herbert C. Walton als Grieve |
| Dodd Mehan als Chemist |
| Hugh Kelly als Casualty Ward Doctor |
| Dorothy Bramhall als Nurse |
| Nelly Arno als Mrs. Rusman |
| Frederick Morant als Concert Agent |
| Grace Denbigh Russell als Orchestra Leader |
 | Eleanor Summerfield als Miss Carteret |
| Olive Walter als Mrs. Langridge |
| Patrick Susands als Shaw |
| Henry Morrell als Judge |
| Leo Britt als John Newcombe |
| Keith Lloyd als Bungey Baker |
| Deidre Doyle als Annie Baird |
 | Ronald Adam als Det Sgt Hawkins - Deaf Man |
| David Walbridge als Leslie Newcombe |
| J. Hubert Leslie als Angus Baird |
| John Boxer als Policeman Making Charge Statement (Uncredited) |
| Madge Brindley als Lady with Children at Station (Uncredited) |
| Daniel Brown als Man in Pub (Uncredited) |
 | Gerald Campion als Newspaper Seller at Station (Uncredited) |
| Dennis Harkin als Man in Phone Box at Station (Uncredited) |
| Fred Nicholas als Detective Kellett (Uncredited) |
 | Campbell Singer als Police Station Sergeant (Uncredited) |
| Ronald Neame | Director |
| Winston Graham | Screenplay |
| Margaret Kennedy | Screenplay |
| Valerie Taylor | Screenplay |
| Anthony Havelock-Allan | Producer |
| William Alwyn | Original Music Composer |
| Guy Green | Director of Photography |
| Geoffrey Foot | Editor |
| Jack Harris | Editor |
| Wilfred Shingleton | Art Direction |
| Joy Ricardo | Costume Design |
| Norman Spencer | Production Manager |
| George Pollock | Assistant Director |
| L.E. Overton | Sound Recordist |
| Charles Poulton | Sound Recordist |
| Winston Ryder | Sound Editor |
| Jack Slade | Sound Editor |
| John Bryan | Production Design |
| Pat MacDonnell | Casting |
| Adele Raymond | Casting |
| Philip Shipway | Second Assistant Director |
| Allan Harris | Draughtsman |
| John Hoesli | Draughtsman |
| T. Hopewell Ash | Assistant Art Director |
| Geoffrey Woodward | Assistant Art Director |
| David Bowen | Sound Assistant |
| George Croll | Sound |
| John Dennis | Sound Mixer |
| George Willows | Sound |
| George Blackwell | Visual Effects |
| Henry Harris | Visual Effects |
| Jack Higgins | Visual Effects |
| Syd Howell | Visual Effects |
| Douglas Woolsey | Visual Effects |
| Ernest Steward | Camera Operator |
| Peter Bryan | Camera Operator |
| John Godar | Focus Puller |
| Peter Hall | Clapper Loader |
| Charles Trigg | Still Photographer |
| Elizabeth Hennings | Wardrobe Supervisor |
| Doris Nash | Assistant Editor |
| Margery Saunders | Assistant Editor |
| Muir Mathieson | Music Director |
| Maggie Unsworth | Continuity |
| Stuart Chant | Publicist |
| Vicky Fuggle | Production Secretary |
