Miss Marple believes she's seen a murder in a passing-by train, yet when the police find no evidence she decides to investigate it on her own.
| Writing | David Pursall | Screenplay |
| Editing | Ernest Walter | Editor |
| Directing | George Pollock | Director |
| Writing | David D. Osborn | Screenplay |
| Art | Harry White | Art Direction |
| Writing | Jack Seddon | Screenplay |
| Production | George H. Brown | Producer |
| Writing | Agatha Christie | Novel |
| Sound | Ron Goodwin | Original Music Composer |
| Camera | Geoffrey Faithfull | Director of Photography |
| Costume & Make-Up | Eddie Knight | Makeup Artist |
| Sound | Ron Goodwin | Conductor |
| Sound | A.W. Watkins | Sound Supervisor |
| Crew | Tom Howard | Special Effects |
| Production | Jan Darnley-Smith | Production Manager |
| Directing | Douglas Hickox | Assistant Director |
| Camera | Austin Dempster | Camera Operator |
| Sound | Robert Carrick | Sound Editor |
| Sound | Cyril Swern | Sound Recordist |
| Sound | J.B. Smith | Sound Recordist |
| Directing | Beryl Booth | Continuity |
| Costume & Make-Up | Felix Evans | Wardrobe Master |
| Camera | Norman Hargood | Still Photographer |
| Costume & Make-Up | Pearl Orton | Hairdresser |
