Planet Zanak, unknown time. The Doctor and Romana are seeking the planet Calufrax where the second segment waits. They are in the right place and the right time… but on the wrong planet.
| Name | Type | Role | |
|---|---|---|---|
| Douglas Adams | Writer | ||
| Ralph Michael | Guest Star | ||
| Bernard Finch | Guest Star | ||
| Adam Kurakin | Guest Star | ||
| Bruce Purchase | Guest Star | ||
| David Sibley | Guest Star | ||
| Primi Townsend | Guest Star | ||
| Andrew Robertson | Guest Star | ||
| David Warwick | Guest Star | ||
| Clive Bennett | Guest Star | ||
| Graham Williams | Director |