“The Bomb”, Interior Launcher & Exterior Landscape, 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 56b1fe83-e758-49fc-8f58-7c95a8e7f55e (CC0).