《曾有两次：《神秘博士》2017圣诞特别篇》是由瑞秋·塔拉蕾执导，彼得·卡帕尔迪,大卫·布拉德利,马克·加蒂斯,珀尔·麦基,莉莉·崔佛斯,杰瑞德·加菲尔德,朱迪·惠特克,托比·怀特豪斯主演的科幻片。该电影于2017年在英国上映。Twice Upon A TimePeter Capaldi’s final episode of Doctor Who this Christmas will feature Pearl Mackie as Bill Potts and be called Twice Upon a Time, it was revealed this evening (23 July) during a cast panel at San Diego Comic Con. Viewers will have to wait until Christmas to discover exactly how Bill, who will appear throughout the episode, makes her return.