10 Actors With Multiple Roles In Doctor Who
2. David Tennant
First Role: Feldwebel Kurtz (Colditz)
Second Role: The Tenth Doctor (The Parting of the Ways - The End of Time)
A little bit of a cheat this one, but still, it is true that David Tennant has more than one role in the Doctor Who world.
All the way back in 2001, the actor lent his pipes to the Big Finish audio drama Colditz, playing German officer Feldwebel Kurtz. This story followed the Seventh Doctor and his companion Ace, as they encountered Nazis in World War II-era Germany.
But that's not all. In 2003, Tennant had a tiny role as "Caretaker" in the animated story Scream of the Shalka, which was released to coincide with the 40th anniversary of the show. Here, Richard E. Grant played the Ninth Doctor, although this numbering was later wiped out by Christopher Eccleston. However, Scream of the Shalka has never been officially struck from canon, and in light of The Timeless Children, it could always be considered one of the Doctor's many, many lives.
After hopping between animated and audio-based dramas, Tennant, of course, went on to play the Tenth Doctor, in what is widely considered to be one of the best eras in the show's long history. Technically, he also had a "second" role during this time too, when an untimely regeneration resulted in the creation of a duplicate Doctor.
After regenerating properly in The End of Time: Part 2, Tennant returned as the Tenth Doctor for the 50th anniversary special in 2013. So, if he returns for the 60th anniversary in 2023, Tennant will have featured in three consecutive Doctor Who anniversary celebrations. How about that.