Way back in 2005, the 34-year-old Tennant made his debut as the Tenth Doctor, assuming the iconic role after predecessor Christopher Eccleston bowed out after just 13 episodes. The Scotsman went on to lead the show through one of its most beloved periods in its 50 plus-year history before he handed over the sonic screwdriver 10 years ago in “The End of Time: Part 2.”
But he’s never really stopped playing the Doctor since. In 2013, Tennant returned opposite Smith and guest Doctor John Hurt for the big 50th anniversary special, and in recent years he’s reprised the character on audio numerous times for Big Finish Productions. As a lifelong Doctor Who fan, Tennant’s part of the Whovian family for life.