Trial of a Time Lord Volume 1
The TARDIS is drawn to a space station where The Doctor is subjected to a Time Lord inquiry into his behaviour, presided over by an Inquisitor. The prosecuting counsel, The Valeyard, presents the first piece of his evidence, which consists of a recording played back on a screen linked to the Matrix. It concerns a visit by The Doctor and Peri to the desolate planet Ravolox, which turns out to be a future Earth, shifted light-years through space.
The court watches as the pair get caught up in a conflict between the surface-dwelling Tribe of the Free, led by Queen Katryca, and the planet’s other inhabitants, a group of subterranean technocrats and their robotic ruler Drathro.
The Valeyard’s second segment of evidence relates to the planet Thoros-Beta. Here The Doctor and Peri meet their old adversary Sil and others of his Mentor race, whose leader Kiv is awaiting an operation from a scientist named Crozier to transplant his brain into another body. They were form an uneasy alliance with a kidnapped Krontep warrior, King Yrcanos, and encounter a group of resistance fighters.