David Graham was a Dalek voice in the first Dalek serial - The Daleks - in 1963/1964, in Dalek Invasion of Earth, 1964, Mission to the Unknown (1965) and Dalek Masterplan, 1965/1966

Dalek Invasion of Earth

Dalek Masterplan

He was also a Mechanoid voice in The Chase, (1966)

He also had two acting roles, as Charlie the Bartender in The Gunfighters, (1966) and as Kerensky in City of Death, (1979)