在时间尽头，命运交错，博士面临巨大抉择，友谊与牺牲难以释怀。japanesefuckmature

　　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."