Re: 800th Episode - 2014 Christmas Special (Rumour's/Poss. Spoilers)
I honestly don't believe Capaldi will be a one-year-only Doctor. Eccleston was a one-off because they weren't sure if DW would be successful enough to warrant a second season, and of course Eccleston himself didn't want to return for one when they knew the show had done well. Plus, I think a three-year gurantee is part of the deal, no?
"Spock...?" Kirk said, whispering.
"I am... most pleased to see again, Captain" Spock formally replied.
McCoy shook his head in disgust. "Oh, for crying out loud, Spock. Its been eighty years!"
"Seventy eight point four years, Doctor."
The Holy Three meet again, in The Return