While the investigation centres on the Jefferson family and their entourage, Miss Marple's hunch about a second killing proves all too tragically justified.
| Name | Type | Role | |
|---|---|---|---|
| T.R. Bowen | Writer | ||
| Silvio Narizzano | Director | ||
| Jess Conrad | Actor | Raymond Starr | |
| Ian Brimble | Actor | Detective Constable Lake | |
| Anthony Smee | Actor | Basil Blake | |
| Trudie Styler | Actor | Josie Turner | |
| Valentine Dyall | Actor | Lorrimer | |
| Debbie Arnold | Actor | Dinah Lee | |
| Andrew Cruickshank | Actor | Conway Jefferson | |
| David Horovitch | Actor | Detective Inspector Slack | |
| Joan Hickson | Actor | Miss Marple | |
| Moray Watson | Actor | Colonel Bantry | |
| Frederick Jaeger | Actor | Colonel Melchett | |
| Raymond Francis | Actor | Sir Henry Clithering | |
| Gwen Watford | Actor | Mrs. Bantry | |
| Ciaran Madden | Actor | Adelaide Jefferson | |
| Keith Drinkel | Actor | Mark Gaskell |