Thunderbirds Are Go!: Season 3, Episode 6

3 - 6: Life Signs

When a rockslide pins Captain Taylor and a scientist in a Martian cavern, Virgil and Alan fly to the planet Mars and assist with the aid of Thunderbird 3 and a specialised Exo-Pod. However, circumstances in the cave lead Virgil to eject the air in his suit, leaving our heroes short on air inside a leaking cave.