A Navy Criminal Investigation Division agent, Burke, assigned to investigate the penetration of Pi-Delta, a top secret global battle simulator and cryptography computer, figures out the intruder is a program and finds Gregory. Under threat of arrest and imprisonment, Gregory and Dr. Hundley go to the Pi-Delta facility and persuade P-1 to act as a security monitor for the complex. P-1 compiles detailed and accurate personality profiles of all the people it interacts with and decides that Burke is ultimately dangerous. A flight control computer screen is altered so that the operator gives bad flight commands. Burke's plane plunges into the ground.