Doctor Who: The Trial of a Time Lord: The Ultimate Foe (TV)

As the Doctor's trial for interfering in galactic affairs nears its conclusion, the Master appears in the courtroom. He reveals that the entire trial is the result of a conspiracy by the corrupt High Council. Even more, the sinister prosecutor is actually a future Doctor, or more precisely the distillation of his evil side. With the trial in disarray and the Master in his own bid for power, the Doctor flees into the Matrix to confront the prosecutor, into a nightmarish world of torture and punishment. Trapped within, he will have to fight for his life against the ultimate foe...