BBC One has revealed that this year's Doctor Who Christmas special will be titled "The Husbands of River Song". Alex Kingston returns for the special in which River Song meets her husband latest incarnation, in the form of Peter Capaldi, for the first time this Christmas. Speaking with The Radio Times, showrunner Steven Moffat says he brought River back as "Obviously, we've just lost Clara so I didn't want to go straight into a new companion, and it's not right to set that up at the end of a series where you're all exhausted." As a result he brought River back for what promises to be something of a romp.