Second Time Lord (The War Games)

An incarnation of Adelphi was a member of the Tribunal.

Biography
Adelphi was a member of the High Council, in addition to serving on the tribunal that sentenced the Doctor. (PROSE: Doctor Who and the Terror of the Autons) He had been sent to the tribunal on orders of Lord President Pandad IV as a direct result of Rassilon's agent, Socra, being asked by his Matrix Lord masters to keep an eye on the Doctor. (PROSE: The Legacy of Gallifrey)

Adelphi, along with the Time Lords Socra and Goth, captured the War Lord after being alerted to his plans by the Second Doctor's Hypercube. He personally explained what the War Lord and his people had done, and how his plans were "an utterly callous disregard for the lives of the humans involved, and for the liberties of all the other species in the galaxy." When he asked the War Lord if he had anything to say in his defence, the War Lord refused to say anything. Adelphi used some of his power to cause intense pain for the War Lord until he spoke, saying that the Doctor collaborated with the War Chief, and that the Doctor was guilty too for it. Adelphi sentenced the War Lord to dematerialisation, wiping him out of existence after his verdict of guilty was reached. Adelphi then listened to the Doctor's defence when his own trial came up and listened as the Doctor passionately addressed the Time Lords' own non-intervention policy and saying they should be helping those in need much like he did. Adelphi later witnessed the Doctor refuse each new appearance offered to him when he and Goth announced his punishment for breaking the Laws of Time was an exile on Earth and a forced regeneration. (TV: The War Games)

After he himself regenerated, Adelphi served as a messenger to the Third Doctor during his exile. (TV: Terror of the Autons)