“The Plague”, Scene 29: The Side Room

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 9e2fff81-5ae3-4c59-a77c-b80993bef0eb (CC0).