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"Upside Down" is the 19th episode of Thunderbirds Are Go! season 3 and the premiere of the season's third and final part. It was broadcast on January 4th, 2020, in the United Kingdom.


Lady Penelope and Parker are testing their new luxury yacht - FAB 2 - when they receive a distress call from an incoming tanker. A tsunami has formed and is heading right for the stalled tanker's location. Can Penelope save the day?


Regular Cast

Guest Cast


Virgil: "Hope you weren't planning on taking it easy on your first trip back out."
Gordon: "I don't do easy."

Lady Penelope: "I don't think I've ever seen a kitchen tool used in a rescue operation before."

Stew: "Flipping the tanker, you think that'll actually work?"
Lady Penelope: "You've obviously never met International Rescue before."

International Rescue Equipment Used


  • There are several references to Gordon's injuries and the destruction of Thunderbird 4, which all allude to the events of SOS Part 2.
    • As such, this is the first episode to show Gordon fully recovered. He was previously seen partially recovered in the two-part episode Signals Part 1 and Signals Part 2.
    • Additionally, this episode confirms that the events of SOS Part 2 saw the destruction of Thunderbird 4 and that an entirely new Thunderbird 4 was built sometime between SOS Part 2 and Signals Part 1.
  • Quite unusually, Thunderbird 2 doesn't deploy Module 4 onto the ocean; instead, it releases Thunderbird 4 directly from inside the module via the underside hatch.
  • This is the second time that Thunderbird 2 goes underwater; this time though, minus the module.
    • This time, however, Thunderbird 2 took a dive into the water, rather than the controlled sinking action seen in Signals Part 2. Possibly as a result of this, Thunderbird 2 ran into difficulty much sooner than it did in that very episode.
  • When Thunderbird 2 encounters difficulty operating, Virgil executes the Jeff Tracy Fix, which was previously seen in Up from the Depths Part 1.
  • The three-man crew onboard a tanker are a reference to Danger at Ocean Deep, whilst FAB 2's appearance is a reference to The Man From MI.5 and Introducing Thunderbirds.
  • This episode takes elements from the 1972 film The Poseidon Adventure, in which a tsunami overturns a cruise ship.