Deep space, an unknown time - on course for Gallifrey, the TARDIS passes through a strange disruption. When they materialise, the scanner shows the Time Lord homeworld... but the travellers have passed into the negative pocket universe of E-Space and are in fact on the planet Alzarius, where evolution works very differently...
| Name | Type | Role | |
|---|---|---|---|
| Andrew Smith | Writer | ||
| Richard Willis | Guest Star | ||
| Andrew Forbes | Guest Star | ||
| Adrian Gibbs | Guest Star | ||
| Leonard Maguire | Guest Star | ||
| Bernard Padden | Guest Star | ||
| George Baker | Guest Star | ||
| June Page | Guest Star | ||
| Tony Calvin | Guest Star | ||
| Peter Grimwade | Director |