About Doctor Who Season 9, Episode 13 :

It’s Christmas Day on a remote human colony where the Doctor is hiding away from the seasonal festivities—but when a crashed spaceship suddenly calls on him for help, he is recruited by his wife, River Song, and soon finds himself being chased across the galaxy by a furious King Hydroflax and his giant Robot bodyguard – which 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.