Colin Thackeray

Sir Colin Thackeray was the head of the World Ecology Bureau during the 1970s.

A scientific expedition in Antarctica transmitted photos of the Krynoid pod they had discovered to Thackeray. He insisted that the Fourth Doctor investigate it. After learning the threat the Krynoid posed to the world, he called in UNIT to deal with it. He went to Harrison Chase's mansion to view the attack. (TV: The Seeds of Doom)

He had died by the early 21st century. (AUDIO: Hothouse)