In an alternative timeline, Lord Zakar was a wealthy Gallifreyan who offered a prize for advances in time technology, the Zakar Prize for Advancement in the Temporal Sciences. (AUDIO: Evolution)
He liked to be called "Zak."
He later argued with Supreme Leader Romana about appeasing the Outsiders who wanted parts of Gallifrey. He was certain that she was not the Romana whom he had once known. He was very well known amongst the Regenerators.
His shuttle was shot down by Leela's township, and she took him into custody to place him on trial for the murder of 237 slaves. Narvin found the proof that Zakar had ordered their deaths, and when Romana presented this evidence, Zakar was promptly arrested by Slyne. (AUDIO: Arbitration)