The Goodies help a suicidal zookeeper to locate a monster for London Zoo's Snowdon Monster House.
| Name | Type | Role | |
|---|---|---|---|
| Graeme Garden | Writer | ||
| Bill Oddie | Writer | ||
| Tim Brooke-Taylor | Writer | ||
| Stanley Baxter | Guest Star | ||
| Bernard Bresslaw | Guest Star | ||
| Lynn Howard | Guest Star | ||
| Jim Franklin | Director |