柯林·坎宁安,查拉·博奇奥,Alicia Oberle Farmer,James Morris,David E. McMahon,Lily Aranda,Jessica Staples,Landon Kasten,Mary Ellen Wolfe,William McAllister,Sean D. Hunter,Jagger Woolstenhulme
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."