Crosscut is an episode of Thomas' Adventures of Thunderbirds Are Go ( 2015 TV Series).
When Thunderbird 5 picks up an unusual radiation spike from a remote corner of Africa, John discovers a former uranium mine has reopened, leading to Scott, Skarloey, and Thomas rushing there in Thunderbird 1 to investigate, with Virgil and Percy following. When Scott, Skarloey, and Thomas arrive and enter the mine, they discover a source of unstable uranium, and are attacked by a mysterious woman, called Marion Van Arkel, who claims that the mine belongs to her family. During their confrontation the mine soon begins to crumble, and she, Thomas, Skarloey and Scott must work together to escape and reseal the mine, before a storm spreads the leaking radiation to the nearest city with serious consequences.
(We begin in some sort of control room)