剧情简介
空军中校约翰·伯顿被指派评估布拉德利步兵战车样品车的效用，这是一种陆军运兵车／侦察车，在其最后的重新设计中，发现其实际上是使乘员置于致命陷阱隐患。伯顿一直试图对它进行适当的实弹装甲测试，但不断被他的临时指挥官，陆军少将帕特里奇阻挠，以便使它在企业中进行定型与生产。。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."。
