Tracy solves the clue, but finds out that Benger and Bunce are crooks and overhears their plans.
| Name | Type | Role | |
|---|---|---|---|
| Andrew Davies | Writer | ||
| Sean Barrett | Guest Star | ||
| Flak | Guest Star | ||
| Katie Hebb | Guest Star | ||
| Harry Jones | Guest Star | ||
| Christopher Biggins | Guest Star | ||
| Juliet Waley | Guest Star | ||
| Juliet Hammond | Guest Star | ||
| Charles Collingwood | Guest Star | ||
| Gary Russell | Guest Star | ||
| Derek Griffiths | Guest Star | ||
| Denise Coffey | Guest Star |