The Trial of a Time Lord, Part Thirteen (The Ultimate Foe)

Résumé :

As the trial of the Doctor continues, an old foe of the Doctor makes an appearance startling the Doctor, the keeper of the Matrix and the Inquisitor alike. The Doctor and the court then discovers who the Valeyard really is. The Doctor goes inside the Matrix after the Valeyard in an attempt to capture him and also prove his innocence in the process.