Before the dust had settled on the emotional series 9 finale of Doctor Who, the BBC showed the new trailer for its Christmas Special. No festive season is complete without Doctor Who and this will be Peter Capaldi’s second Christmas episode. This year will feature Greg Davies as the big headless red robot King Hydroflax and apparently the husband of returning River Song, Alex Kingston. Matt Lucas also appears in the trailer. Catch the special on BBC One on Christmas Day and watch the trailer below.