Doctor 6x03, "The Curse of the Black Spot"

[kindkit]

That did not make any sense. I don't understand why Rory leaving the ship returned him to being almost drowned, when he was stabilized while on the ship. I don't understand why those who stayed on the ship were shown, at the end, as awake and able to move around, as opposed to being anaesthetized bodies kept in stasis--especially since we were specifically told that the siren/doctor couldn't cure humans. I don't understand why on TV, people always end CPR and dissolve into teary grief after 30 seconds . . . and then 30 seconds later the "dead" person coughs and regains consciousness. And especially, I don't understand this:

Rory: *falls overboard*
Doctor: Nothing can save him now except -
Me: A rope?
Doctor: - the siren.
Me: Bzuh?

I'm also a trifle puzzled by how a seventeenth-century pirate flies a spaceship, especially one that, unlike the TARDIS, doesn't look even vaguely analogous to a sailing ship. But that's more the kind of WTF that I expect from Doctor Who and don't mind.

Not an episode I liked all that much, but Amy made a great swashbuckler for a minute there. And next week's trailer looks good.

ETA: And how did they get the TARDIS back when it was in the parallel universe? (ETA 2: Never mind, on double-checking I see that they went into the TARDIS from the spaceship, rather than going back to the pirate ship and then going into the TARDIS.) And also, in re: Amy's CPR, isn't it canon that the TARDIS has medical facilities?