a security guard, they find a personnel file with Lucas' address and drive to his home. Reaching the danger zone, Brains and Virgil transfer to Thunderbird 2s Mobile Crane and intercept the Crablogger. Donning jetpacks and boarding the vehicle, they cut into the cockpit with lasers and have the crew airlifted to hospital. Breaking into the sleeping Lucas' house, Penelope wakes him at gunpoint and orders him to recite the shutdown sequence into a tape recorder. She then shoots him with tranquiliser to send him back to sleep and relays the information to Brains and Virgil. Brains inputs the sequence, but it will take three minutes for the Crablogger's reactor to power down and the dam is straight ahead. Eventually the vehicle comes to a halt on a crumbling ridge. Scott arrives in a tanker and passes its lines over to Virgil and Brains, who pump out the Crablogger's remaining fuel to avert a large explosion that could threaten the dam. Their job complete, they fly to safety in their jetpacks moments before the ridge collapses and the Crablogger falls to the ground. The vehicle is destroyed but the dam is untouched. Lucas, who thought that his encounter with Penelope was just a dream, is stunned to learn of recent events and wearily takes the Crablogger design back to the drawing board. Production The Crablogger was designed by special effects director Derek Meddings, who contributed on set by operating the props for the vehicle's clawed arms. The rear of the studio model was fitted with cans of compressed air whose contents were slowly released to simulate a dust trail. This threw so many particles into the air that the crew were forced to wear respirators while filming the model. The Crablogger theme is re-use of the Sidewinder theme from "Pit of Peril". The San Martino Dam was a modified form of a scale model originally built for the Stingray episode "In Search of the Tajmanon". The freight lorries in front of the dam were represented by Matchbox die-cast toys. "Path of Destruction" was the final APF production of director David Elliott, who believed that his friendship with Gerry Anderson had broken down and left the company shortly after completing his work on the episode. Reception Marcus Hearn calls the episode a "classic" as well as "one of the most compelling" Thunderbirds instalments, boasting a "heady cocktail of food poisoning, nuclear