While Kayo and Alan are trying to get the stolen Thunderbird 3 back, Virgil and Lady Penelope have to save Scott from sinking beneath the bottom of the sea.

Cast: Rasmus Hardiker, David Menkin, Thomas Brodie-Sangster, Kayvan Novak, Vas Blackwood, Angel Coulby, Rosamund Pike, David Graham, Aimee-Ffion Edwards, Andres Williams