 A huge robot that is even bigger than many of the giants that the castaways have encountered accidentally destroys a store and in the process kills a policeman. Steve, Mark and Fitzhugh, who were scavenging for food and supplies witness this and in the process Mark and Fitzhugh are captured. They are then brought to the laboratory of its creator Professor Gorn who offers to help them return to Earth if they can help him fix the flaw in his creation. They eventually do and the robot works perfectly. Unfortunately, Gorn double crosses them and decides to turn them over to the SID.