“The Plague”, Scene 37: Main Deck (later)

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 18a132a5-b639-463b-bb50-6d88e0ff60f3 (CC0).