It's Christmas Day on a remote human colony and the Doctor is hiding from carols and comedy antlers. But when the Time Lord's help is requested he finds himself recruited into River Song's squad and hurled into a fast and frantic chase across the galaxy! 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 work out who the Doctor is? All will be revealed on a starliner full of galactic super-villains and at a destination the Doctor has been avoiding for a very long time...