A. That was amazing.
B. Holy fucking shit.
C. Every character was perfectly in character. That was beautiful. I have no clue what's going to happen next.
I just... I loved that. That was so spectacular. I'm still blown away.
Rose and the Doctor -- so in love, or what, huh?
Jack once again drops everything to return to the Doctor's side, but this time, he promises Gwen and Ianto that he'll come back.
Gwen is so good at taking charge. It's hot.
I'm so glad that we got the character updates (and name drops!) of the people who weren't with us.
And Donna remembering the bees (some bees are alien, but not all because that would be daft. Hah!) and that being part of the key -- that's what got them close enough to get the signal.
I love Harriet Jones having a sentient computer link thing (funded by Mr. Copper! The Doctor made the right choice, leaving him all that money). I love that she stood by her choice then and stands by her choice now (and I bet the Doctor still feels that he made the right choice as well).
Martha! Going home at the end of the world. That's so her. I loved her in this.
And Sarah Jane! Like Jack, leaves to go find the Doctor the second she can (and her telling Luke she loves him -- aw!).
Then the reunion! And a regeneration! Dude! What's going to happen? Dude!
(did you see their faces? they looked so incredibly happy and blissful in that big run towards each other. And it was Rose's theme, OMG!)
Overall, that was just fucking fantastic.