Oh, no! Now I really am finished.
It all comes down to this. After twelve episodes, spanning nearly three full months, “The Trial of a Time Lord” finally concludes with “The Ultimate Foe” (Story Production Code 7C Part 2), written by Robert Holmes (episode thirteen) and Pip and Jane Baker (episode fourteen). The prior three sub-stories establishing why the Sixth Doctor is on trial—Holmes’ “The Mysterious Planet,” Philip Martin’s “Mindwarp,” and the Bakers’ “Terror of the Vervoids“—tax the audience’s patience, teasing at a conspiracy regarding the Matrix, that impregnable repository of all Time Lord knowledge, while hiding any real evidence to support the claim, like some poorly scripted mystery novel written by many hands. Taken on their own, the prior installments of “The Trial of a Time Lord” work well enough as Doctor Who stories, but viewers inevitably feel shortchanged by their incomplete nature. They are missing something vital, a feeling of helplessness mirrored by the Doctor’s own predicament as “The Ultimate Foe” begins, with the Inquisitor (Lynda Bellingham) about to pass judgement on our hero, much to the delight of the prosecuting Valeyard (Michael Jayston).
With the Keeper of the Matrix (James Bree) testifying that the Matrix can only be accessed with the Key of Rassilon, which he wears on his person at all times, eye witnesses are the only proof the Inquisitor will entertain regarding evidence tampering. At a trial being held “out of time,” on a space station in the middle of nowhere, how could the Doctor possibly muster such assistance? No minor shock, then, when Sabalom Glitz (Tony Selby), last seen in “The Mysterious Planet,” and new companion Mel (Bonnie Langford) suddenly appear in the courtroom, an answer to the Doctor’s greatest need. Whence this miraculous gift? Further shock still, with the Doctor’s benefactor revealed as his long-time adversary: The Master (Anthony Ainley).
Scarcely four minutes pass in the first episode of “The Ultimate Foe” before the Master’s intervention, a scene with greater impact than any in the three hundred fifty odd minutes of the dozen prior episodes. For those viewers who slog through the story to this point, the Master’s unforeshadowed appearance, commandeering the screen in the trial room, proves ample payoff, a moment of glee at the unexpected twist, to say nothing of the welcome return of a familiar fiend. Yet one wonders why producer John Nathan-Turner and script editor Eric Saward withhold this revelation for so long, when even a brief aside or two inserted into the sub-stories, hinting at his involvement, might amplify the anticipation. And on reflection, the Master appearing from on high—from inside the Matrix, as it transpires, much to the Keeper’s chagrin—feels like an unearned deus ex machina, dropped in to solve an insuperable plot conundrum caused by multiple writers contributing to the same story.
Aided by Glitz’s testimony, which fills in the “censored” gaps about the Matrix being surreptitiously accessed from “The Mysterious Planet,” the Doctor discovers that the Time Lords moved Earth “billions of miles across space,” resulting in its devastation, to hide the knowledge that had been purloined from the Matrix by the Andromedans. This implication of the High Council in a conspiracy and cover-up, resulting in mass death and the destruction of Earth’s “ancient culture,” finally reveals what the entirety of “The Trial of a Time Lord” has been about, with the Doctor set up as a scapegoat to hide the Gallifreyan leadership’s complicity in genocide. Well, almost what it’s all about.
The real revelation, the whole point of this fourteen episode-long, season-spanning story, comes as an adjunct to the High Council’s perfidy. Almost in passing, the Master reveals the Valeyard’s role in the trial:
The Master: They made a deal with the Valeyard, or as I’ve always known him, the Doctor, to adjust the evidence, in return for which he was promised the remainder of the Doctor’s regenerations.
The Doctor’s ultimate foe, then, is the Doctor himself…