The Rani plans to transfer her time tunnel to the centre of the Earth's time meridian, and use her store of genetic codes and brain prints of every living creature to control evolution itself. Can the Doctor escape from the time trap and save the universe?
| Name | Type | Role | |
|---|---|---|---|
| David Roden | Writer | ||
| John Nathan-Turner | Writer | ||
| Nicola Bryant | Guest Star | ||
| Louise Jameson | Guest Star | ||
| Steve McFadden | Guest Star | ||
| Tom Baker | Guest Star | ||
| Sarah Sutton | Guest Star | ||
| John Leeson | Guest Star | ||
| Adam Woodyatt | Guest Star | ||
| Lalla Ward | Guest Star | ||
| Deborah Watling | Guest Star | ||
| Mike Reid | Guest Star | ||
| Jon Pertwee | Guest Star | ||
| Sam West | Guest Star | ||
| Richard Franklin | Guest Star | ||
| Ross Kemp | Guest Star | ||
| Caroline John | Guest Star | ||
| Nicola Stapleton | Guest Star | ||
| Peter Davison | Guest Star | ||
| Stuart McDonald | Director |