The Pandorica Opens
Idea Proposed but Not Used in Galactica 1980: Time-travel story involving Cleopatra and anachronisms.
Central Premise Recycled From: The "Whose Doctor Who" documentary at one point featured a child opining that the Doctor's enemies should form an alliance, gang up on the Doctor, take away his TARDIS and maroon him somewhere. Apparently one Steven Moffat was listening.
Reference to Moffat's Back Catalogue: "The Forest of Fear"-- the Doctor's "I'm the Doctor, look me up" bit as a way of getting bad guys to back off before they start. Worked out better for him there, obviously.
Gratuitous Scottish Joke: Again none, unless you count the return of gratuitous Scottish jokes Bracewell and Vincent van Gogh.
Amy Saves the Day with Wuv: Well, I'm not sure what you'd call it, but Amy certainly does *something* to the day with Wuv.
Tennant Line: Didn't notice one, but then I was too busy waiting for the Pandorica to Open.
Star Wars Bit: River Song's Celtic gear was clearly stolen from Princess Leia during the Hoth sequences of The Empire Strikes Back. Presumably when C-3PO was doing the laundry.
Nostalgia UK: Ahhh, fond memories of "The Eagle of The Ninth," "Sky," "The Box of Delights," and all the other British children's fiction involving ancient Romans and/or Stonehenge. And apparently Amy has the same memories.
Teeth!: None! But hey, horses!
Item Most Likely to Wind Up as a Toy: Leaving aside the fact that the end of the story looks like a sale in the toy aisle of our local Tesco's, who wouldn't love a mechanical coin bank based on the Pandorica?
Something Gets Redesigned: The whole universe, apparently.
The Crack in the Universe Is: Everywhere, though it starts in the TARDIS scanner.