The Good Omens actor joins Catherine Tate and Neil Patrick Harris for a trio of special episodes in November.
“I just hope I look as fast as I did in the 2000s,” he says.
As Tennant reminds EW, “There’s some precedent for ex-Doctors showing up for guest appearances.”

David Tennant on ‘Doctor Who’.James Pardon/BBC
But Tennant is the first returnee to play thecurrentDoctor.
“What a gift to put into my hands, come and meet the new Doctor!
And David Tennant turned out to be one of the most successful Doctors of all time.”

Neil Patrick Harris on ‘Doctor Who’.James Pardon/BBC
“You do spend your years away fromDoctor Who, always watching it.
Always thinking of ideas.
Thinking about how I would expand it, thinking of stories…

‘Doctor Who’.Alistair Heap/BBC
It never goes away.
I have been inventing stories in my head ever since I was about six.
So when I left the show, that doesn’t stop.”
The showrunner reveals that casting Tennant and Tate in the specials was a no-brainer.
“On a really simple level, it’s working with two of the best actors in the world.
I love them as friends.
I love their presence.
I’m really interested to push the Doctor and Donna into things they’ve never done before.”
In addition to Tennant and Tate, the cast of the specials includesNeil Patrick HarrisandHeartstopperstarYasmin Finney.
So much for the human characters, or thehumanoidones anyway.
Tennant has less world-conquering ambitions for the 60th anniversary episodes.
The actor simply wants to not disappoint those Whovians who fondly remember his earlier adventures as the Time Lord.
“I just hope I look as fast as I did in the 2000s,” he says.
Well, as the Doctor knows all too well, traveling back in timecanbe a risky business.