After the New South Wales government went silent on a proposal to recycle water collecting in abandoned subway tunnels below Sydney, TV journalist Natasha Warner (Bel Deliá) brought a crew to the site in search of an exposé. As they journeyed underground, however, the hapless investigators would discover an underground lake-and a monstrous inhabitant who didn't take well to the intrusion. Found-footage frightener co-stars Luke Arnold, Andy Rodoreda, Steve Davis. 94 min. Widescreen; Soundtrack: English; Subtitles: English (SDH); audio commentary; bonus documentary "The Tunnel: The Other Side of Darkness" (2021); featurettes; alternate ending; theatrical trailer; more.