I love how Moffat plays with time. First in The Girl in the Fireplace, then in Blink, then with River Song in the library episodes. And of course, in this episode too, where [spoiler]five minutes for the Doctor turns out of be "twelve years and four psychiatrists" for Amy Pond.[/spoiler]
He even does it on shows that AREN'T about time travel. Coupling had a couple episodes like that.
The Girl with Two Breasts told the story of two characters with a language barrier between them; the scene played out once from each character's perspective.
Split featured a splitscreen showing the story from two different characters' perspectives; in the final scene the events taking place were an hour apart, so you'd see Susan trip over something on the floor on the bottom screen and then Steve knock it over on the top screen.
Episode 3 of Jekyll starts with Tom waking up with blood on his hands and slowly pieces together how he got there.
I think for RTD time was just a destination, but it's clear that Moffat is treating time-travel as an integral part of the show rather than just a reason for ladies to wear Victorian bonnets.
In fairness, the Ninth Doctor brought Rose back a year later than he was supposed to.
I liked this regeneration episode better than the Christmas Invasion
I think I like it better than ANY regeneration episode I've seen. Castrovalva is probably #2, as it dropped the new Doctor straight into an already-in-progress battle with the Master. And because it was the only serial where the Fifth Doctor had a good excuse for standing around looking helpless and bewildered.
(Still haven't seen the #4, #6, or #7 regeneration, and of course #2's lost and #9 doesn't exist. But I already know the #7 one is pretty much "We fired Baker and stuck a wig on McCoy" bullshit. And Romana regenerates just for the fuck of it.)