Peter 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.。一生仅有一次的生日,将你带往奇迹的冒险!就在小茜生日的前夕,谜之炼金术师希波克拉底和他的弟子皮波突然出现在缺乏自信的她面前。“希望你拯救我们的世界!”两人向小茜恳求道。然后,小茜被强行带到了另一个世界——和古董店地下室的门相连的“充满幸福之色的Wonderland”。不可思议的动物和人们居住着的世界,被当作救世主守护即将从这个世界消失的颜色的小茜,在大冒险的尽头所做出的改变人生的决定是?一生仅有一次,特别兼神奇的生日开始了!。