在时空的边缘，博士与伙伴们面对终极黑暗，勇敢地选择了希望与救赎的道路。天海翼美图诱惑

　　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."