When he felt the sudden sharp tingling on his skin which came from the alarm device under his wrist watch, Dr. Halder Leorm turned unhurriedly from the culture tray he was studying, walked past the laboratory technician to the radiation room, entered it and closed the door behind him. He slipped the instrument from his wrist, removed its back plate, and held it up to his eye. He was looking into the living room of his home, fifty miles away in another section of Orado's great city of Draise. A few steps from the entry, a man lay on his back on the carpeting, eyes shut, face deeply flushed, apparently unconscious. Halder Leorm's mouth tightened. The man on the carpet was Dr. Atteo, his new assistant, assigned to the laboratory earlier in the week. Beyond Atteo, the entry from the residence's delivery area and car port stood open.