BBC America take a closer look at the onscreen interactions of the Tenth and Eleventh Doctor as they come face to face in The Day Of The Doctor. Steven Moffat, David Tennant, Matt Smith and Jenna Coleman talk about the difficulties and the potential for fun that comes with a multi-Doctor episode.
"I think what's so exciting about it, it offers up so many possibilities," says Jenna Coleman. "Basically, imagine going inside the Doctor's head, and him arguing with himself, and he can think as fast as himself, but all of this is played out loud."
Watch the clip here:
The Day Of The Doctor will be released on DVD and Blu-ray on 2nd December in the