The Doctor lands on Deimos, moon of Mars, where ancient Ice Warrior catacombs have become a tourist attraction — and the Martian dynasties are not as dead as history claims.
| Name | Type | Role | |
|---|---|---|---|
| Niky Wardley | Guest Star | Tamsin Drew | |
| Jack Brown | Guest Star | Pilot | |
| David Warner | Guest Star | Professor Boston Schooner | |
| Nicky Henson | Guest Star | Gregson Grenville | |
| Nick Wilton | Guest Star | Harold | |
| Nicholas Briggs | Guest Star | The Ice Warriors |