Episode 4: “Bell of Doom”, Scene 6: Tavanne’s Study

On these albums

Doctor Who: The MassacreJohn Lucarotti starring William Hartnell & Peter Purves · 1999Soundtrack

Doctor Who: Adventures in HistoryWilliam Hartnell, Patrick Troughton with linking narration by Peter Purves & Frazer Hines · 2003Soundtrack

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

Source: MusicBrainz recording f9d60629-7c99-4809-b92a-6d8316905e2e (CC0).