Male and female, positive and negative. With hands linked, they formed a deadly weapon capable of delivering a lethal high-voltage shock to anyone, anything they touched. Fear made them hostile – and dangerous. Recognising himself in them and fascinated by the lovely Lioa, Mark Harris was drawn into their charged current. They alone could tell him where he had come from, who he was. But he had not reckoned on the forces that would compel him, calling him to complete a desperate alien mission, threatening the fragile new bond he had forged with the earth – and with Men. Cover shows Patrick Duffy as Mark Harris in the TV series Man From Atlantis.