Christopher Baker

Christopher Baker 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, as one incarnation of the Doctor with beard and hat. (DWM 329). He also appeared during the flashback sequence in The Timeless Children.

Chris Baker's incarnation of the Doctor was last seen in the Doctor Who Lockdown webcast Strax Saves the Day

According to Stuart Humphryes and Obverse Books, as of November 2020 he had already passed away.