Re: 800th Episode - 2014 Christmas Special (Rumour's/Poss. Spoilers)
Um, remember that Sarah Jane Adventures episode, Death of the Doctor
And personally, I'm not exactly a fan of the idea of the Christmas Special being a trilogy... but, on the other hand, it reminds me of the Master trilogy in season 19/20, consisting of Keeper of Traken
"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