Before Tom could counter the surprise attack, the man's fist cracked against his cheekbone. Tom, though stunned, lashed out. More punches flew back and forth. Tom landed a stinging blow to his opponent's midriff, then took a punishing one himself.

Suddenly Tom felt the stranger's hand clawing at his pocket for the key to the gate. With all his wiry strength, Tom locked his arms around the man and wrestled him to the ground.

The stranger fought like a tiger. But a second later a jeep screeched to a stop. Three security guards, led by stocky Phil Radnor, leaped out. Within moments they had the man subdued.

Tom quickly briefed the security men on what had happened.

"All right, mister, start talking!" snapped Radnor, head security police officer.

The man's only reply was a scowl of rage.

"Okay, take him away till he cools off," Tom ordered.

Disheveled and still panting, the man was bundled into the jeep and driven off to the security building.

Tom arrived there by motor scooter several minutes later. Harlan Ames, the slim, dark-haired security chief of Enterprises, had taken charge of the case, and the prisoner was now being fingerprinted and photographed.

"Any leads?" Tom inquired.