Matt Smith and Karen Gillan return as the Doctor and his companion in an all-new Doctor Who Christmas special on Blu-ray and DVD. Amy and Rory are trapped on a crashing space liner, and the only way the Doctor can rescue them is to save the soul of a lonely old miser, Kazran Sardick. But Sardick, the richest man in Sardicktown, beyond redemption? And what is lurking in the fogs of Christmas Eve? Writer/Executive Producer Stephen Moffat (The Original UK Coupling, Sherlock) describes the special, "We're going for broke with this one. It's all your favourite Christmas movies at once, in an hour, with monsters. And the Doctor. And a honeymoon. I've honestly never been so excited about writing anything. I was laughing madly as I typed along to Christmas songs in April." Special guest stars include Michael Gambon (Harry Potter) and Welsh singing sensation Katherine Jenkins.