Wyatt (Inferno Earth)

In a parallel universe visited by the Third Doctor, Private Wyatt was an RSF soldier stationed at the Inferno Project at the Eastchester Scientific Labour Camp. When the Doctor was thrown into the parallel universe, Wyatt had become infected by Stahlman's ooze and was beginning to mutate into a Primord.

When a group of RSF soldiers led by Platoon Under-Leader Benton chased the Doctor to a power plant, Wyatt attempted to attack the Doctor. However, on Benton's orders to shoot the Doctor on sight, a RSF soldier saw Wyatt and mistook him for the Doctor and fired at Wyatt. The shots caused Wyatt to fall from the tower to his death. (TV: Inferno)

Behind the scenes
The stunt of Wyatt falling from the tower was not performed by Derek Ware (he had been a stuntman on Doctor Who since An Unearthly Child in 1963) but by fellow stuntmen Roy Scammell, who strangely played the part of the RSF soldier who guns Wyatt down. (DWM 305)