A town busybody is poisoned at a busy reception in the home of famous film star Marina Gregg. The poisoned drink seemed intended for Marina, but Miss Marple is not so sure. She sets out to discover the true identity of the killer before he or she can strike again.
| Writing | Agatha Christie | Novel |
| Directing | Norman Stone | Director |
| Production | George Gallaccio | Producer |
| Writing | T.R. Bowen | Screenplay |
| Camera | John Walker | Director of Photography |
| Editing | Bernard Ashby | Editor |
| Production | Sharon Levinson | Casting |
| Art | Linda Sherwood-Page | Graphic Designer |
| Production | Camilla Griffith-Jones | Associate Producer |
| Production | Katrine Dudley | Production Manager |
| Production | Jackie Taylor | Location Manager |
| Production | Juley Harding | Production Assistant |
| Art | John Hardy | Construction Manager |
| Lighting | Ted Turpin | Gaffer |
| Sound | Steve Hudson | Sound Mixer |
| Sound | Stephen Young | Sound Editor |
| Sound | Stephen Barnham | Sound Editor |
| Sound | Alan Blaikley | Original Music Composer |
| Sound | Ken Howard | Music |
| Sound | John Altman | Music Director |
| Costume & Make-Up | Suzanne Jansen | Makeup Designer |
| Costume & Make-Up | Judy Pepperdine | Costume Designer |
| Art | Merle Downie | Production Design |
| Art | Alan Spalding | Production Design |
