Stott

Stott, along with Della, was an assistant to Tryst on his expedition to collect and catalogue flora and fauna from many planets in the galaxy.

Biography
Stott was secretly an undercover officer in the Space Corps assigned to investigate vraxoin smuggling. While on Eden, Tryst shot him and left him for dead, but he became part of the Eden sample stored in the Continuous Event Transmuter.

Stott escaped when the CET became unstable after the Empress collided with the Hecate upon emerging from hyperspace above Azure, and aided the Fourth Doctor and Romana II in exposing Tryst and his partner Dymond. (TV: Nightmare of Eden)