'Up From the Depths' Part 1 by Benjamin Townsend

A deep ocean surveyor craft mapping the Marianas Trench discovers part of a crashed aircraft, which bears the words ‘TV-21 Colonel Jeff Tracy’ on its nosecone; but before the surveyors can investigate further their ship inexplicably loses control, and they plunge to the ocean floor. Out in space, John in Thunderbird 5 picks up the surveyors’ last transmission, and he immediately contacts Tracy Island. When Scott and the others see what the surveyors found they are astonished: the TV-21 was their father’s first Thunderbird, which crashed and was thought lost forever. After Virgil and Gordon have left on a rescue mission in Thunderbird 2, taking Pod 4 with them, John detects a signal sent from Parkmoor Scrubs prison; believing it to be from the Hood, John tracks its path to its destination. When the GDF refuse to go on any wild goose chase, John asks Lady Penelope to investigate the signal instead. Thunderbird 2 arrives above the Marianas Trench and deploys Thunderbird 4, which Gordon pilots into the depths in search of the trapped surveyor crew; he quickly locates the stricken craft, and after checking that the crew are alright, Gordon turns his attention to the wreckage nearby. Clearing some of the mud and debris, Gordon is amazed to find not just a part, but the entire TV-21 craft, which is still intact! At Tracy Island, Scott explains to Alan and Kayo that the TV-21 was the prototype to Thunderbird 1; but the aircraft was sabotaged by the Hood, forcing Jeff to eject and leave the ship to crash, its final whereabouts unknown. Meanwhile, Lady Penelope, Parker and Bertie arrive at the signal’s destination, an abandoned warehouse that appears to be empty; however, when Bertie starts barking at a wall, Penelope traces an energy reading and uncovers a hidden control room. Watching from Tracy Island, Brains identifies the technology as belonging to the Mechanic, confirming the villain’s link to the Hood. Back at the Marianas Trench, Gordon is puzzled by the lack of damage to the surveyor craft; watching his progress, Brains suddenly spots a familiar logo on the ship and shouts a warning; but he is too late – the surveyor craft activates under the Mechanic’s remote control, grabbing Thunderbird 4 with its mechanical arms and crushing the sub’s hull. As the Mechanic unleashes ray-mechas upon Thunderbird 4 as well, Gordon dons Brains’ new deep water exo-suit and prepares to evacuate; with the airlock door jammed from the Mechanic’s attack, Gordon uses the exo-suit’s laser to cut a way through the hull, managing to escape just as Thunderbird 4 explodes under the stress. After the Mechanic’s uses the hijacked surveyor craft to rip Thunderbird 4 in half, Gordon can only watch helplessly as the villain then steals the TV-21…

Thomas Brodie-Sangster (John Tracy), Rasmus Hardiker (Scott Tracy / Alan Tracy), David Menki (Virgil Tracy / Gordon Tracy), Kayvan Novak (Brains), Rosamund Pike (Lady Penelope Creighton-Ward), David Graham (Aloysius Parker), Sandra Dickinson (Grandma Tracy), Angel Coulby (Tanusha 'Kayo' Kyrano), Chris Jarman (The Mechanic / Pilot Clarke), Alex Kelly (Pilot Sontag)

Directed by Andrew McCully
Produced by Sharon Lark
Created by Gerry Anderson and Sylvia Anderson

TX:
UK (ITV 1):
19th November 2016 @ 4.00 pm

Notes:
*Featuring John Tracy, Scott Tracy, Virgil Tracy, Gordon Tracy, Alan Tracy, Tanusha 'Kayo' Kyrano and Brains