While on school summer holidays in Auckland, they are contacted by a man named Mr. Jones, who had met them briefly eight years earlier.
Led by the evil Mr. Wilberforce, the slug monsters were now bent on destroying Earth and only the twins' emerging psychic abilities could turn them back.
Because Theo's faith in his abilities and his belief in supernatural phenomena in general is lacking, his half of the bridge is insufficient to complete the construct.
[2] For some reason the video format chosen for the DVD was NTSC, while the original production material would have been produced for PAL transmission as that is the standard in use throughout New Zealand and Australia.
[citation needed] In 2009 Under the Mountain was adapted into a New Zealand feature film with cameos by Kirsty Wilkinson and Bill Johnson, directed by Jonathan King.