“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 b7370aea-a3ca-4c24-b43f-8827c9389c03 (CC0).