The Last Day was a mini episode as part of the run-up to the 50th anniversary special. 　　神秘博士50周年迷你剧，接在The Night of the Doctor和The Day of the Doctor之间。

神秘博士50周年特辑“博士之日”前传短片

1938年,Madge Arwell在骑单车回家时救了自天空坠落的太空人天使,而他回报她的方式是让她许一个愿望.1941年的战争中,她带着两个孩子逃出伦敦,在失去在外作战的丈夫音讯下,她撤退到一处乡下大宅,遇上了奇特的管家,房间裡竟有个大大的蓝色电话亭衣橱.圣诞节,他的礼物使他们全进入一个奇幻却危险的世界.Madge将会学到如何比她想像的更加勇敢和愿望成真的可能

A meeting in a London bus with jewel thief Lady Christina takes a turn for the worst for the Doctor when the bus takes a detour to a desert-like planet, where the deadly Swarm awaits.

博士的塔迪斯被追尾，肇事船居然是泰坦尼克号。原来一家外星旅游公司仿照泰坦尼克号制造了一艘巨大的泰坦尼克号宇宙飞船。但是飞船却连续遭遇不幸：防护罩被毁，装上陨石群，船长死去，服务机器人嗜杀成性……。

失去了罗斯的博士正在心灰意冷，而正在举行婚礼的多娜却被突然传送到塔迪斯里。博士带坏脾气的多娜返回地球，却被一群外星机器人追杀，塔迪斯上演了一场公路飚车。后来博士发现多娜身上带有异常含量的Huon粒子，而该粒子来源于上一代宇宙霸主。而博士的母星加利弗雷在宇宙中崛起时，已经消灭了所有的Huon粒子。最终博士揭开了一个藏于地球40亿年的秘密。

本集讲述博士和泰勒回到当代的伦敦渡过圣诞节。然而，外星人希克拉库斯（Sycorax）却在这时入侵地球。最终，因重生过后昏倒的博士及时醒来，击退入侵者。在英国，这集有980万人收看，并取得正面的评价。 　　这是扮演第十任博士的大卫·田纳特首次出演整部《神秘博士》剧集。此前，他在《背水一战》的最后一幕出场。同时，这是《神秘博士》首部的圣诞特辑。自此以后，BBC One每年均会制作一部圣诞版的《神秘博士》剧集。

The Doctor faces the end of his life as the Master's plans hurtle out of control. With the sound of drums growing louder, and an ancient trap closing around the Earth, the Doctor and Wilf must fight alone. But sacrifices must be made, and the deadly prophecy warns: "He will knock four times.&quot

The Ood have given a warning to The Doctor. The Master is returning yet that is not the biggest threat. A darkness is coming which brings with it The End of Time.

The TARDIS lands in London on Christmas Eve, 1851 and almost immediately the Doctor hears his name being called. When he meets the woman shouting for him she fails to recognise him and continues calling until another man arrives and claims to be the Doctor and acknowledges the woman, Rosita, as his companion. 　　The Doctor then attempts to help the newcomer lasso a man-size dog-li...