Whilst talking to the Radio Times, Steven Moffat revealed a few new details about this year's Doctor Who Christmas Special, scheduled to premiere on Christmas Day 2015.
We already know that River will appear in this year’s Christmas special, and that she doesn’t recognise the Doctor, but we didn’t know when exactly the story will take place.And now we also have a synopsis for the episode...
Until Steven Moffat told us.
“It doesn’t really matter, but for those who care, it’s immediately after The Angels Take Manhattan .”
“River’s just seen Matt Smith’s Doctor lose Amy and Rory, and obviously before The Name of the Doctor  because she’s dead in that.”
“It’s strange because they’re now, in our human terms, the perfect couple. They’re both sexy older people. It’s always been slightly strange before with Matt Smith. Now, yeah, they could actually be married. It works.”
“There’s been a lot of talk about the Doctor and River’s glory years but we’ve never seen them. Here at last we see them as Mr and Mrs Who at the height of their powers. It’s great fun.”
Moffat also revealed that this might have been his last ever Doctor Who episode.
“We’ve just lost Clara, so I didn’t want to go straight into a new companion, I’ll be honest, I brought River Song back in because I thought there was a possibility I’d never write it [Doctor Who] again so that’d be my goodbye.”
It’s Christmas Day on a remote human colony and the Doctor is hiding from Christmas Carols and Comedy Antlers. But when a crashed spaceship calls upon the Doctor for help, he finds himself recruited into River Song’s squad and hurled into a fast and frantic chase across the galaxy.Source: Radio Times
King Hydroflax (Greg Davies) is furious, and his giant Robot bodyguard is out-of-control and coming for them all! Will Nardole (Matt Lucas) survive? And when will River Song work out who the Doctor is?
All will be revealed on a starliner full of galactic super-villains and a destination the Doctor has been avoiding for a very long time.