Episode Four, Scene 5: Vaughn's Office, I.E. Factory Compound

On these albums

Doctor Who: The InvasionDerrick Sherwin from an idea by Kit Pedler starring Patrick Troughton, Frazer Hines, Wendy Padbury narrated by Frazer Hines · 2004Soundtrack

Doctor Who: The Lost TV Episodes - Collection FiveVarious Artists · 2012

Source: MusicBrainz recording 30b53c97-7a1a-4ec9-a6a7-b2122483c513 (CC0).