“The Bomb”, Inside the Castle, Refusis

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 bb795878-9bcf-4f97-bb36-82eed85cf084 (CC0).