The Doctor meets a new enemy – the Shadow – who wants the Key to Time. And the Atrian-Zeon war is approaching an awful climax.
| Name | Type | Role | |
|---|---|---|---|
| Bob Baker, Dave Martin | Writer | ||
| Ian Saynor | Guest Star | ||
| William Squire | Guest Star | ||
| Iain Armstrong | Guest Star | ||
| Michael Hayes | Director |