Morgaine forces Ace and Shou Yuing to hand over Excalibur by threatening to release the Destroyer, so the Doctor and the Brigadier enter a dimensional portal to stop her.
| Name | Type | Role | |
|---|---|---|---|
| Ben Aaronovitch | Writer | ||
| Marcus Gilbert | Guest Star | ||
| Christopher Bowen | Guest Star | ||
| Stefan Schwartz | Guest Star | ||
| Angela Bruce | Guest Star | ||
| Ling Tai | Guest Star | ||
| Angela Douglas | Guest Star | ||
| Michael Kerrigan | Director |