A Mystery in Cambridge (1)

In deep space, the Institute for Advanced Scientific Studies is quarantined, and a recorded message warns ships away. Professor Caldera contacts Skagra, who tells him to come to the main lab, where Caldera finds his colleagues motionless and their minds trapped in a white sphere. Skagra adds Caldera’s mind to the sphere. Meanwhile, in Cambridge, Chris Parsons arrives at St Cedd’s College to borrow books from Professor Chronotis, who is forgetful but hospitable. Chris collects random books and leaves, puzzled by an old police box in the room. The Doctor and Romana arrive at Chronotis’s, who offers them tea and mentions a dangerous book from Gallifrey, The Worshipful and Ancient Law of Gallifrey, which he wants returned. As they search for it, Skagra, using a mind-controlling sphere, commandeers a car and heads to his Ship, where he reviews the Doctor’s history and contacts the Krarg Commander, planning to seize the book and conquer the Universe.