Speaking to BBC Radio 1's funky hip and thoroughly with it news show Newsbeat, David Tennant has revealed a little about the scope of the his Doctor Who story.

Viewers will see David Tennant as the Doctor in three more live action episodes, with The Waters of Mars airing on November 15th and the final two extra-long episodes expected on Christmas Day and New Years Day - at which point the Doctor will regenerate.

But how does he get there? We don't quite know - but Tennant has described the story as "epic"...

"Because you can only tell the story of a character dying once it allows you to go to places you haven't quite been before.

"It allows you to tell types of stories that you can't do when it's an ongoing series. It allows it to be bigger and more epic, and sadder and wilder, and the stakes are just that bit higher."

There's almost nothing in the way of clips at present - yet you can just feel the tension, can't you?

(Via Digital Spy)