Christopher Baker
From Tardis Wiki, the free Doctor Who reference
Christopher Robin Baker (7 June 1937-20 February 2011[1]) was a production assistant within the BBC Plays department in the 1970s. He made an uncredited onscreen appearance, after volunteering when a call-out was made internally within the BBC staff for people to cameo during the mindbending contest in The Brain of Morbius[2], as one incarnation of the Doctor with beard and hat, (DWM 329) in a Puritan outfit although only his moustache was real. (DWM 564) He also appeared during the flashback sequence seen in The Timeless Children.