“There is some evil in all of us, Doctor – even you. The Valeyard is an amalgamation of the darker sides of your nature, somewhere between your twelfth and final incarnation, and I may say you do not improve with age. „
~ The Master to the Sixth Doctor about the Valeyard
This quote from the master to the Sixth Doctor, hints at who John Hurts “Doctor” is. The Valeyard is the main antagonist of the 14-part Doctor Who serial “The Trial of a Time Lord”. He is a lawyer and a future incarnation of the Doctor himself.