David Graham was a frequent guest actor on the original series of Doctor Who. Well known for his portrayal of the ill-fated Professor Fyodor Nikolai Kerensky in City of Death, Graham also played the bartender Charlie in The Gunfighters.
A versatile voice-over actor, Graham's most prolific Doctor Who work came in providing voices for Daleks in The Daleks, The Dalek Invasion of Earth, The Chase (for which he also provided voices for the Mechonoids ), Mission to the Unknown and The Daleks' Master Plan, as well as both Dalek movies starring Peter Cushing, Dr. Who and the Daleks and Daleks' Invasion Earth 2150 A.D..
Outside Doctor Who, Graham is perhaps best known for providing a number of voices for the popular "Supermarionation" adventure series, Thunderbirds, for Century 21 Productions. These included regular characters of Gordon Tracy, Brains, and Parker, the latter of which he reprised for the 2015 reboot, Thunderbirds Are Go!.
Graham has also featured in a number of television commercials, appearing as the "Big Brother" character on the giant screen advertising the Apple Macintosh computer in 1984, and reprised his role of Brains for a series of credit card commercials in New Zealand.
- Internet Movie Database at the