在时间尽头，博士面临着生死抉择，友情与命运交织，令人心潮澎湃。透视小霸王

　　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."