Idea Proposed and Used to Death during the New Series: The Doctor's dead! Oh no he isn't! Oh yes, he is!
Central Premise Recycled From: The Pandorica Opens, mostly.
Reference to Moffat's Back Catalogue: River Song, weddings, monks, Cleopatra and other ancient Roman celebrities, the annoying blue guy from the mid-season closer (still not dead), doubles, animate skulls, nerdy guy with an unrequited thing for a pretty girl who's waiting for the Doctor, a timeline arrested but then continuing inexorably towards someone's death, weddings, some catastrophe which is spreading through the universe with the Earth as its epicentre, an explosion-in-a-Tesco-toy-department array of aliens.
Amy Screws Up the day with Wuv: Turns out, judging by her drawing of her ideal man, that she doesn't love Rory, but Stephen Gately.
Robert Holmes Called...: ...from beyond the grave, but he'd like to remind you that there was an often-overlooked and unimportant episode of Blake's 7 featuring electrocution by chess game as a spectator sport observed by jaded New Romantics who like brutalist decor.
And from Lawrence Miles: The Doctor's dead! Because some alien things with a connection to Area 51 want it so! Or maybe not! And there's pyramids!
Murray Goldwatch: I notice that he managed to work the da-da-da, da-da-da-da-da theme into the children's story competition winner in Confidential.
Nostalgia UK: Is the title a reference to the V-after-it-got-really-camp episode The Wedding of Charles and Diana?
Inside Jokes: "What's with all the eyepatches?" asks the cover of the Radio Times. It's a tribute to Nicholas Courtney, of course. Confidential also indicates that one of the jaded New Romantics has a gasmask for a face.
Teeth! On the pterodactyls! And the skulls! And the anachronistically humanlike ones on the Silurian with a Honker.
Hats! Stetsons are still not cool if they've been given to you by James Corden.
Fish! No, which rather misses a trick.
Small Child! There's a group of them menaced by pterodactyls.
Item Most Likely to Wind Up as a Toy: Character Options probably won't, but I'm betting there'll be a future issue of Doctor Who Adventures which provides kids with their own wearable eyepatches.
Just so's you know, last weekend I had half an hour to kill in Euston Station, so I went to the cafe, ordered scones, and then texted everyone to let them know.