Publisher's Synopsis
Another adventure for everyone's favourite Time Lord. Landing on Earth in the 22nd century, the Doctor (Peter Davison), Adric, Nyssa and Tegan help to defuse a subterranean bomb being operated from space. The bomb's operators are tracked to a star freighter where they are revealed to be none other than the Cybermen. The Doctor has to prevent the Cybermen from destroying the Earth, and is caught in a race against time to save Adric's life.
