“The Traitors”, Scene 10: Mavic Chen's Office, Earth

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 e8405dcb-56c4-4b71-a448-e35d174b7788 (CC0).