In the far-flung future of 1981, science plays a great part in crime prevention. But Franklin Dirk and Jack Baker of the secret service find that nerves and brains are just as important. Written by Ray Cummings, included here are all three stories of Dirk and Baker as they investigate murder, blackmail, and undersea pirates in the commerce of Great New York: "Bandits of the Cylinder," "The Disappearance of William Roger," and "Rats of the Harbor."