“The Bomb”, Main Deck, The Ark

On these albums

Doctor Who: The ArkPaul Erickson and Lesley Scott starring William Hartnell, Jackie Lane & Peter Purves · 2006Soundtrack

Doctor Who: The TV Episodes - Collection SixVarious Artists · 2013

Source: MusicBrainz recording 6e6c003e-e6bb-4fbf-b671-25c02acde47f (CC0).