be a disguise taken by a cranial parasite while it and the Tenth Doctor were trapped in the TARDIS' matrix. The Time Traveller's Companion, a supplement for the Doctor Who – Adventures in Time and Space: The Roleplaying Game, implies that the Valeyard is a rogue Watcher, similar to the one produced in Logopolis, generated during the regeneration of the Twelfth Doctor into the Thirteenth. This Watcher, presumed to possess all the most negative traits of the Doctor's darker nature, refused to rejoin with the Time Lord and escaped into the wider universe to eventually put the Doctor on trial. Another Big Finish audio, Trial of the Valeyard, has the Valeyard captured and put on trial by the Time Lords, but he requests that the Sixth Doctor act as his defence, provoking the Doctor into accepting the deal by offering to tell the Doctor about his origins. The Valeyard claims he was created on a planet orbiting Eta Rho by the Thirteenth Doctor, who was experimenting with ways to break the regeneration limit. He is able to escape through the Matrix, retreating to Eta Rho and attempting to kill the Doctor with a bomb disguised as the 'Black Scrolls' of the Doctor's future self, the Valeyard posing as a senile old man who was apparently the Thirteenth Doctor. The Doctor sees through the deception and the Valeyard escapes again, leaving the Doctor to contemplate that the Valeyard may have included some truth in his story even if he denounces the overall picture as a lie. In the audio The Sixth Doctor: The Last Adventure, the Valeyard masterminds a complex plot to infect the TARDIS with an alien intelligence that will allow him to subvert the Doctor and take control of his body while drawing on the Doctor's own negative emotional energy to restore himself. This plan brings him in contact with the Sixth Doctor at various points in his life, the Valeyard restoring his energy in an encounter in a pocket universe while the Doctor is travelling with Constance Clarke (End of the Line), stealing a crucial piece of equipment on a planet inhabited by 'werewolves' while the Doctor is with Charley Pollard (The Red House), and gaining new energy in a confrontation in Victorian London with the Doctor, Flip Jackson, Professor Litefoot, and Henry Gordon Jago (Stage Fright). Although the Valeyard's plan succeeds in allowing him to essentially 'transplant'