Classic sci-fi TV series Under the Mountain follows the adventures of redheaded twins with psychic powers — Rachel and Theo — on their Auckland summer holiday. They meet the mysterious Mr Jones, an alien emissary who enlists them in the battle against the evil Wilberforces, who are plotting planetary destruction. Adapted from the Maurice Gee novel, the series' fx left their slimy imprint on a generation of NZ kids, haunted by the transmogrifying Wilberforces, who changed from humans into giant slugs slithering underneath Auckland’s volcanoes.