Idea Proposed and Used to Death during the RTD Era: Seriously, doesn't this feel like the distilled essence of RTD-era Base-under-Siege stories? It's equal parts "The Impossible Planet," "42" and "The Waters of Mars," plus echoes of the Master duplicating himself endlessly in the Era Finale. Also the Sontarans apparently got hold of some of that Flesh stuff.
Central Premise Recycled From: "The Impossible Planet," as mentioned. More philosophically, there's bits of The Thing, Blade Runner, Alien and The Death Guard in there.
Reference to Moffat's Back Catalogue: Surprisingly little this week, though we do get a quick Moffat Moppet, and surreal zombie creatures in spacesuits.
Amy Screws Up the day with Wuv: After the last two episodes, it's probably not surprising that Rory seems to be getting a bit up-close-and-personal with Ganger-Jennifer.
Joss Whedon Called...: He wants the philosophical concepts behind Dollhouse back. Oh, and Bioshock claim we've stolen their suits.
And from Lawrence Miles: People being reconstituted from a magic vat of fleshstuff, like in Interference.
Murray Goldwatch: Hits the heights of banality this week, with a distinctly Muzaklike tone to some of the non-leitmotif pieces. Or perhaps it's a comment on the alienating nature of manual labour?
Nostalgia UK: Casting Marshall Lancaster in a story about industrial unrest is just going to make everyone think of Life on Mars, you know.
Inside Jokes: Marshall Lancaster, above. There's a quick visual reference to Lady Cassandra in the sequence where Ganger-Jennifer emerges from the Flesh, and the Doctor shows his RTD-era fondness for climbing up spires. A monastery with an anachronistic record playing in it appeared in "The Time Meddler."
Teeth! More freaky-mouth action as a full-blown set of lips sprout out of the Flesh
Hats! None, but the suits have nifty Helmets.
Fish! The Doctor thinks Amy and Rory should go out for some. With chips.
Small Child! Ganger-Jennifer holds a picture of herself as a small child and reminisces about her early memories.
Item Most Likely to Wind Up as a Toy: The Gangers of course.