Things look desperate. Skagra is almost within grasp of Salyavin's power. Can the Doctor save the day with his special helmet?
| Name | Type | Role | |
|---|---|---|---|
| Douglas Adams | Writer | ||
| Jennifer Lonsdale | Guest Star | ||
| Lewis Fiander | Guest Star | ||
| Barry Andrews | Guest Star | ||
| Geoffrey Bateman | Guest Star | ||
| Peter Craze | Guest Star | ||
| Geoffrey Hinsliff | Guest Star | ||
| Sebastian Stride | Guest Star | ||
| David Brierley | Guest Star | ||
| Eden Phillips | Guest Star | ||
| Pennant Roberts | Director |