《曾有兩次：《神秘博士》2017聖誕特別篇》是由知名导演瑞秋·塔拉蕾 执导的一部科幻片，彼得·卡帕爾迪 大衛·布拉德利 馬克·加蒂斯 珀爾 等倾情出演，该片讲述了：Peter Cap  aldi’s fina l episode of Doct  or Who th is Chr istmas  will featu re Pearl Mackie as Bil l Po tts and be called Twice Upo n a Time,  it was rev ealed  this e vening  (23 July) dur ing a cast  panel a t San Diego Comic C  on. Viewe rs will have to wait until   Christmas to disc over ex actly how Bill, who will appear  throughout the episode,  makes her retur  n.　　想到那个神出鬼没的东西 ，印颜的心又剧烈跳 动起来，“本来，昌长老感觉能按住那条大尾巴 ，可是，不知怎的， 它突然又厉害起 来，然后，那小冥兽，好 像鬼魅一般，借着地利，  连着抹了西才他们的脖子，昌长老没办法，才完全放开了身体的封印。”