Graham Cole was, from the Fourth Doctor era to the Sixth a regular player, though he was only twice credited - as a marshman in Full Circle and Crewmember in Resurrection of the Daleks. He was the Melkur, a significant figure in The Keeper of Traken, but was not credited as the Melkur was voiced by Anthony Ainley as the new Master. He was a Kinda tribesman and a cyberman in Earthshock and finlly a Jacondan in The Twin Dilemma. On documentaries about Doctor Who he has always spoken of the 'credibility' he had from being a cyberman on Doctor Who and seems proud of his contribution to the series.

Jacondan

Kinda

Marshman

Melkur