“The Plague”, Scenes 12-17: Main Deck, Commander’s Room and 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 46e14251-f2fa-49f6-94a5-3fa5e837924c (CC0).