He also played a ruthless Sontaran Commander in the Doctor Who serial The Invasion of Time.
Alongside Sontaran commander Strax, a large battalion of Silurian warriors, and the newly space-pirating former crew of the Fancy, they help to apprehend Colonel Manton and his Cleric forces.
The Fifth Doctor's sequence in the novel The Eight Doctors – featuring the Eighth Doctor going through his own past to meet and assist his other selves – takes place after this episode, the Fifth Doctor travelling to the Eye of Orion to continue their earlier holiday only to be attacked by a renegade Time Lord from the Eighth Doctor's era using the Timescoop, forcing the two Doctors to defeat a Raston Warrior Robot and a Sontaran squadron.
He found the heavy Sontaran costume so difficult to manage that he could not leave the Hound Tor location for breaks, and also could not perform the fight scene - a stand-in, Stuart Fell, was used instead.