An extra body is found buried in a grave in a small village where, twenty years ago, an expensive emerald necklace was stolen. Lord Peter must find the killer - and the jewels.
| Name | Type | Role | |
|---|---|---|---|
| Anthony Steven | Writer | ||
| Dorothy L. Sayers | Writer | ||
| Michael Stainton | Guest Star | ||
| Anthony Roye | Guest Star | ||
| Keith James | Guest Star | ||
| Edwin Brown | Guest Star | ||
| Desmond Llewelyn | Guest Star | ||
| Ronald Adam | Guest Star | ||
| Keith Drinkel | Guest Star | ||
| Jane Cussons | Guest Star | ||
| Sandra Frieze | Guest Star | ||
| Robin Wentworth | Guest Star | ||
| Anne Blake | Guest Star | ||
| Raymond Menmuir | Director |