Scott manages to create blind confusion in the Zombites' headquarters, the three escape and the pyramid is destroyed. The Hood audaciously steals 'The mighty Atom', a Robot rat that can be programmed to take photographs. He plans to photograph the Thunderbirds, but fortunately for International Rescue, during its mission the Mighty Atom stumbles on another subject. At the Bank of England, an employee has been trapped in a time-lock vault that is set to remain closed for two years. The air is being pumped out and the employee will soon die.
Thunderbirds arrive to save the man and begin to burn their way in.
Two giant Fireflash airliners have crashed into the Atlantic under mysterious circumstances. Although International Rescue manage to save the pilot of the second crash, they can find no explanation of it. On a third flight, Thunderbird 2 follows the Fireflash, and the cause of the trouble is located - a saboteur hidden in the wing. At the last moment, Gordon repairs the sabotage and the Fireflash is saved. A jealous racing driver strands Alan Tracy and Grandma on a new road bridge with an ultra-sonic device connected to a bomb so that if they move, they die.