Third doctor - s08e59 The Daemons torrent

In the village of Devil's End an archaeological dig is excavating the infamous Devil's Hump, a Bronze Age burial mound. The dig is being covered by BBC Three. A local white witch, Olive Hawthorne arrives to protest, warning of great evil and the coming of the horned beast, but she is dismissed as a crank. Watching this, the Doctor tells Jo that Miss Hawthorne is right — the dig must be stopped, and they go there.