The 589th episode of Doctor Who airs on BBC1. This story, in keeping with the 20th season’s theme of revisiting past stories, brings back both the Brigadier and the Black Guardian. Nicholas Courtney returns as the Brigadier and Valentine Dyall guest stars as the Black Guardian.
This timeline entry leads to an entry covering this entire Doctor Who serial; there are plans to write new episodic entries in the future. You can support this effort!
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