Alex Kingston is back as the mysterious archaeologist and convicted murderer who shares a close relationship with the Doctor, the only companion who knows his true name.

It’s Christmas Day in the future and the TARDIS is parked on a snowy village street, covered in icicles, awaiting its next adventure. Time traveler River Song meets her husband’s new incarnation, for the first time this Christmas.

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. King Hydroflax is furious, and his giant Robot bodyguard is out of control and coming for them all.. Will Nardole  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…

Airs on Christmas Day, BBC1 at 5.15pm