Anyway, the Doctor jumps out of a cake. I've had dreams of this, bowtie included. All the stags stare at him and are confused, and the Doctor goes, "Rory! That's a relief. I thought I'd burst out of the wrong cake. Again. That reminds me, there's a girl outside in a bikini. Could someone let her in, give her a jumper? Lucy. Lovely girl. Diabetic." Utterly charming, every second of this. But then he dicks it up by immediately relating how Amy kissed him and it was a good kiss, and then everybody stares, and then he does the cutest thing I've ever seen, this Adam Brody move with one arm, that just perfectly encapsulates the awkwardness of it all. Brilliant.
Credits, and then you've got the Doctor wearing adorable goggles and soldering or something, his hair looks great, he's giving the happy couple a weird speech about how every Companion is broken: "Oh! The life out there, it dazzles. I mean, it blinds you to the things that are important. I've seen it devour relationships, and plans... Because for one person to have seen all that, to taste the glory and then go back, it will tear you apart." Therefore, he is sending Rory and Amy on a date.
They get into a slight dick-measuring contest about how Rory is not sufficiently enraptured by wonder with regard to the TARDIS, but Rory holds his own, explaining that he read up on the Doctor and dimensions and whatnot after the Prisoner Zero thing. He doesn't blink. I mean, he's as much of a cardboard thing as Amy is, and I find the actor by turns delightful and annoying as hell, but it's written toward a very cool thing, where it's almost like the Doctor is setting Rory up against himself, to say "no" to him, as much as it's about putting distance between him and Amy.
They head into Venice and the Doctor babbles his usual nonsense about the history of Venice and Casanova and wacky zany talk. They find out about Calvieri's lies about the plague -- which is totally interesting and they don't go into it at all! -- and the psychic paper says that Rory is a eunuch, and they giggle and run around for all of ten seconds before they spot Isabella's father harassing the Veelas on their morning constitutional and trying to get his daughter out of there. There's hissing and teeth and whatnot, and the Doctor runs off to brief Dad, who says something is going on with the Calvieri School: "Something magical, something evil. My own daughter didn't recognize me. And the girl who pushed me away, her face... Like an animal!"