Digital Spy's Who expert Morgan Jeffery reviews the Doctor Who Christmas special, 'The Husbands of River Song' which marks the first time that the Twelfth Doctor Peter Capaldi has appeared alongside long-time recurring character River Song, played by Alex Kingston.

Synopsis from TVGuide.co.uk: When a crashed spaceship calls upon his help, the Time Lord finds himself recruited into River Song's squad and hurled into a fast and frantic chase across the galaxy towards a destination he has been avoiding for a very long time. 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? Time-travelling adventure, guest starring Matt Lucas, Alex Kingston and Greg Davies with Peter Capaldi

Check out Digital Spy's channel for more Doctor Who reviews and interviews.

Follow Digital Spy on Twitter at http://twitter.com/digitalspy

Like Digital Spy on Facebook at http://fb.com/digitalspyuk