crucial instant, a voice spoke in his ear. "Houston! What's going on? You haven't said a thing for two full minutes!" "I'm all right!" Houston snapped. Only the force of long training and habit kept him from shouting the words aloud instead of keeping them to a subvocal whisper. "All right or not," said the other, "we're coming in in seven minutes, as ordered. Meanwhile, there's a news bulletin for you; the British division has picked up another Controller—a woman named Dorrine Kent. Two in one night ought to be a pretty good bag." For a moment, Houston's mind was a meaningless blur. Dorrine! And then another voice broke through his shock. "Dear me, sir! Calm yourself! You're positively fizzing!" Houston jerked. Standing in the doorway of the office was Norcross Lasser, with a benign smile on his face and a deadly-looking .38 automatic in his hand. Behind him stood John Sager and Loris Pederson, their faces wary. "Please drop that stun gun, Mr. Cop." In those few moments, Houston had regained control of himself. He realized what had happened. The interruption of his thought-probe had startled him just a little, but that little had been enough to warn the Controller. He wondered which of the three men was the actual Controller. He began to lower his weapon, then, suddenly, with all the force and hatred he could muster, he sent a blistering, shocking thought toward the man with the gun. Lasser staggered as though he'd been struck. His gun wavered, and Houston fired quickly with his stun gun. At the same time, Lasser's automatic went off. The bullet went wild, and the stun beam didn't do much better. It struck Lasser's hand, paralyzing it, but it didn't knock out Lasser. The mental battle that ensued only took a half second, but at the speed of thought, a lot of things can happen in a half second. Houston realized almost instantaneously that he had made a vast mistake. He had badly underestimated the enemy. There