Trama
Jeff Tracy kicks Brains pretty close to the edge by demanding a new Thunderbird, Thunderbird 6. He repeatedly rejects each of Brains' designs, but at least he gets further with an airline company by designing Skyship One, a revolutionary new aircraft. Lady Penelope and the rest of IR are honored guests at the ship's maiden voyage, but trouble soon arises when sinister forces put their plan into action. Will Jeff only be left with Thunderbird 6 (if he ever gets one)?