A 50-minute special based around Keith's initial discovery of Marion and Geoff's affair, and thus a prequel to the series proper, although produced between the first and second runs.
| Name | Type | Role | |
|---|---|---|---|
| Steve Coogan | Guest Star | ||
| Mark Benton | Guest Star | ||
| Atticus Blick | Guest Star | ||
| Tim Wylton | Guest Star | ||
| Richard Dixon | Guest Star | ||
| Tracy-Ann Oberman | Guest Star | ||
| Mike Hayward | Guest Star | ||
| Amanda Root | Guest Star | ||
| Shirley King | Guest Star | ||
| Tracy-Ann Oberman | Guest Star | ||
| Mary Healey | Guest Star |