“The Bomb”, Inside the TARDIS

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 5133ed48-16a2-421e-b8fd-a0bfc474812e (CC0).