Fyrax

 was the leader of the Time Tank which collided with The Doctor's TARDIS. He explained to Romana II that he was on a mission back to Aoris. He then took the Fourth Doctor to Drang. He was tasked to taking the Doctor to Era 14 as an ambassador. (AUDIO: The Paradox Planet) He was interrogated as a way to convince the Doctor to help Embery. At the end of the war he remained in Era 14 and spread the word of Machina with Tyrus. (AUDIO: Legacy of Death)