在时间边界上，敌人悄然逼近。爸爸我要

　　The TARDIS materialises in England in the 1970s and the time travellers meet a girl named Isobel whose uncle, computer scientist Professor Watkins, has recently gone missing. The Doctor offers to help track him down, starting at the place where he last worked - the London HQ of International Electromatics, the world's major supplier of electronic equipment. 　　His initial suspicio... (展开全部)