10 Doctor Who Guest Actors Who Also Played The Doctor

Both of Patrick Troughton's sons have had guest roles in Doctor Who and played their father's incarnation of the character on audio. David Troughton, however, is the more prolific guest star of the two. He was an extra in The Enemy of the World, appeared alongside his father in the Second Doctor's final story The War Games, and starred as the King of Peladon alongside Jon Pertwee. He was also a former flatmate of Sixth Doctor actor Colin Baker and memorably stole the show from Peter Davison in A Very Peculiar Practice.

Troughton returned to the series in the David Tennant episode Midnight as Professor Hobbes. A few years after that and he was cast as the Second Doctor in a series of Doctor Who audios centred around Tom Baker's Fourth Doctor. It's a great performance, and the fact that he doesn't sound exactly like his father adds to the mystery of the character. Troughton would also go on to read audiobooks of Second Doctor stories for the BBC.

Interestingly, in the 1990s, he was considered as a possible replacement for Sylvester McCoy's Seventh Doctor, when the Virgin New Adventures range wanted to regenerate him. A photoshoot was commissioned for reference, but the BBC vetoed the idea.