“Mission to the Unknown”, Scene 22, Dalek Conference Room

On these albums

Doctor Who: The Daleks’ Master PlanTerry Nation & Dennis Spooner starring William Hartnell, Peter Purves & Adrienne Hill · 2001Soundtrack

Doctor Who: The Lost TV Episodes - Collection TwoVarious Artists · 2011

Source: MusicBrainz recording db972d7a-f522-4f95-8528-861c4d7eec32 (CC0).