Jack Kine

Jack Kine (20 September 1921-14 January 2005) was a visual effects designer for the 1968 Doctor Who television story The Mind Robber. He was also seen, uncredited, as "the Leader" in the second episode of Inferno. (DWM 305)

Kine's career had been a fairly long one before coming into Doctor Who. He has credits going back to at least the early 1950s. Notably, he had been a special effects designer on the various Quatermass series of the 1950s. Robber, in fact, came late in his television career, and may have in fact been his final television credit.