"I'd say he used that Dimension Vault to transfer the wreckage of the CyberKing into the Time Vortex, there to be harmlessly disintegrated," says Jackson Lake, the Victorian Age's answer to a question nobody asked. Then he jumps up on a lamppost and decides to make everything even stupider. "Ladies and gentlemen, I know that man! That Doctor on high. And I know that he has done this deed a thousand times! But not once, no sir, not once, not ever, has he ever been thanked! But no more! For I say to you, on this Christmas morn, Bravo, sir! Bravo!" They all cheer, and it's so fucking dumb I can't believe it. "Bravo! Bravo, sir! Bravo, Doctor."
The Doctor is stoic in his own little dreamworld of sadness and the humanity or whatever, and then finally hears them applauding, which makes him smile at wave at them, and it starts to snow. Needless to say, Jackson Lake is down there crying like a baby. And for my part, I have just fulfilled my promise to spit right on the floor.
Later, London is a mess due to being stomped on by a giant robot, but they're cleaning it up. Jackson calls himself "a widower, but with my son and with a good friend." Rosita... Oh, she doesn't matter anymore, I guess. "Frederic will need a nursemaid and I can think of none better!" Even the Doctor looks at him like, "I'm so sure." Jackson invites him to dinner with the family, at the Traveller's Halt. "A Christmas feast, in celebration." Jackson looks down, away, but stays present: "And in memory of those we have lost." The Doctor just looks at him, sad, because of all people Jackson Lake must know that he won't stay. "You know me," he says, and Jackson follows him saying, "I don't think anyone does." Not anymore.
Jackson geeks out at the sight of the real TARDIS, but can only handle being in there for like five seconds before he runs back out into the street, laughing his ass off adorably. The Doctor watches him laugh, and loves him ever more, and finally they get ready to say goodbye for, oh, the fourth time I think. When do we jump on the bed with Dominic Monaghan? Wake me up when it's time for that one.