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

Résumé :

The Doctor continues his quest to capture and stop the Valeyard, the Master assists him with the help of Glitz, leaving everyone to wonder if the Master may have plans of his own for the Doctor and the Time Lords. As things progress, in the strange world of the Valeyard the Doctor comes closer to either stopping the Valeyards evil plans or the end of his existence.