Thanks to the design genius of Brains, a new luxury airship lifted by anti-gravity and controlled by computer is ready for it's maiden flight. Lady Penelope, Parker, Alan and Tintin are the passengers for this maiden flight but things are already going wrong. The real crew has been replaced by imposters who plan to use Lady Penelope to lure International Rescue into an ambush so they can steal the secrets of the Thunderbirds.
Meanwhile, Brains is struggling with Jeff Tracy's demand for a sixth Thunderbird...
This is a better film than the first though again we don't see a huge amount of actual rescuing. The build-up to the criminal's plot is excellent and the plot works as a feature length film not an over long TV episode. Highly enjoyable though it is a shame that this was the end of the line of the classic Thunderbirds series.
