“The Return”, The Security Kitchen

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 15334dc4-b4d8-422e-abf8-b8270024cc3b (CC0).