N is for... Norton

A member of Captain Dent's Interplanetary Mining Corporation crew, Norton's role was to infiltrate and undermine settlements on planets which IMC planned to exploit for mineral resources. He turned up at the settlement on the planet Uxarieus, claiming to be the sole survivor of another group of colonists who had been attacked by huge lizard monsters and hostile indigenous peoples.

This was to provide back-up to attacks by the monsters which had now begun here - really the work of an IMC mining robot under the control of the sadistic Morgan.

Accepted by the others, Jo Grant was suspicious of him. On learning that the colony relied on an old power generator, he sabotaged this - first murdering technician Jim and his native helper. Norton made it look like the Uxarien had killed Jim in an unprovoked attack, and he had then killed the native in self-defence. 

As the Doctor and firebrand colonist Winton plotted against IMC, Norton passed information on to Dent and Morgan - including warning of a break-in and a later ambush. He was shot dead by the colonists during the latter.

Played by: Roy Skelton. Appearances: Colony in Space (1971).

• A regular voice performer - including Daleks and the Mondasian Cybermen - since the Hartnell era, this was Skelton's first on-screen appearance in the series.