PARTS ONE-FOUR The Doctor is put on trial by the Time Lords, accused of causing harm to those he has met on his travels. An adventure on the planet Ravolox is presented as evidence for the prosecution. PARTS FIVE-EIGHT Further evidence against the Doctor is presented in the form of his recent visit to Thoros-Beta where he once again encountered his old adversary, the scheming Sil. PARTS NINE-TWELVE As evidence in his defence, the Doctor selects an adventure from his own future which takes place aboard a luxury star liner. A murderer is on the loose, along with the alien Vervoids. PARTS THIRTEEN-FOURTEEN The Doctor begins to suspect that the Time Lords have a hidden agenda, and the Valeyard's true identity is revealed.