The Valeyard is unmasked

Tags: Sixth Doctor, Mel Bush, The Master, The Valeyard

The Trial of a Time Lord: The Ultimate Foe, episode 13
29 November 1986

The evidence at the trial is complete. However, the unexpected arrival of the Master, from within the Gallifreyan Matrix itself has thrown matters into disarray. His knowledge of how the Time Lords destroyed Earth’s civilisation and renamed it Ravalox to protect some of their leaked secrets enrages the Doctor. But the Master knows far more - including who the Valeyard really is...