Tannis (Death Comes to Time)

General Tannis, also known as Mr Tannis on Earth, was a Time Lord in another universe.

He raged a war upon the Canisians to allude the Time Lords.

During an investigation carried out by the Seventh Doctor, he murdered the Doctor's companion Antinomy.

Later, the Doctor sacrificed himself to kill Tannis, the both died. (NOTVALID: Death Comes to Time)