David Graham

David Graham was a prolific and 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 Charlie the Bartender in "The Gunfighters." A versatile voice-over actor, Graham also provided voices for the Mechanoids in "The Chase," and also for the Daleks in "The Daleks," "The Dalek Invasion of Earth," "The Chase," "Mission to the Unknown," and "The Daleks' Master Plan," as well as the first of the Dalek movies starring Peter Cushing, Dr. Who and the Daleks.

Outside Doctor Who, Graham is perhaps best known for providing the voice of "Brains" in the popular "Supermarionation" adventure series, Thunderbirds. He recently reprised that character voice for a series of credit card commercials in New Zealand.

Amusingly, Nickolai Kerensky is the fictitious character that the 2007 NBC pilot episode of Andy Barker, P.I. centers around.