 | Margaret Rutherford als Miss Jane Marple |
 | Stringer Davis als Jim Stringer |
 | Robert Morley als Hector Enderby |
 | Flora Robson als Miss Milchrest |
 | Charles Tingwell als Inspector Craddock |
 | Gordon Harris als Sergeant Bacon |
 | Robert Urquhart als George Crossfield |
 | Katya Douglas als Rosamund Shane |
 | James Villiers als Michael Shane |
 | Noel Howlett als Mr. Trundell |
 | Finlay Currie als Old Enderby |
 | Duncan Lamont als Hillman |
 | Kevin Stoney als Dr. Markwell |
 | Frank Atkinson als Hotel Night Porter (uncredited) |
 | Roger Avon als Police Photographer (uncredited) |
| Fred Griffiths als Landlord (uncredited) |
| George Pollock | Director |
| Agatha Christie | Novel |
| James P. Cavanagh | Screenplay |
| Lawrence P. Bachmann | Producer |
| George H. Brown | Producer |
| Ron Goodwin | Original Music Composer |
| Arthur Ibbetson | Director of Photography |
| Bert Rule | Editor |
| Geoffrey Kidd | Boom Operator |
| John Barry | Assistant Art Director |
| Frank White | Art Direction |
| Tom Howard | Special Effects |
| A.W. Watkins | Recording Supervision |
| Irene Howard | Casting Director |
| Sydney Streeter | Production Manager |
| Basil Rayburn | Assistant Director |
| Paul Wilson | Camera Operator |
| Denis Rogers | Sound Editor |
| J.B. Smith | Sound Editor |
| David Bowen | Sound Recordist |
| Betty Harley | Continuity |
| Maude Churchill | Wardrobe Master |
| Eddie Knight | Makeup Artist |
| Pearl Orton | Hairdresser |
