'Crosscut' by Mark Huckerby and Nick Ostler

When John detects an unusual radiation spike from a remote part of South Africa, Scott and Virgil set out in Thunderbirds 1 and 2 to investigate. Scott arrives on the scene first and traces the leak to an old uranium mine; making his way inside, he takes the lift down into the depths, where he comes under attack from a mysterious woman wearing a power-loader exo-suit. The woman, Marion Van Arkel, claims that the mine belongs to her family, and she believes her rescuer to be an intruder after her uranium. As Marion begins to hoist up a batch of uranium canisters, the mine starts to crumble and the crane gives way, destroying the lift in the process. Trapped inside the mine, Scott and Marion must find a way out before the radiation poisoning kills them…

Rasmus Hardiker (Scott Tracy), David Menkin (Virgil Tracy), Thomas Brodie-Sangster (John Tracy), Kayvan Novak (Brains), Sandra Dickinson (Grandma Tracy), Adjoa Andoh (Colonel Casey), Teresa Gallager (Marion Van Arkel), Andres Williams (The Hood)

Directed by David Scott
Produced by Sharon Lark
Created by Gerry Anderson and Sylvia Anderson

TX:
UK (ITV 1):
18th April 2015 @ 8.00 am, in 'Scrambled!'

Notes:
*Featuring Scott Tracy, Virgil Tracy, John Tracy and Brains