A scuba-diving expedition in New Guinea goes terribly wrong when disaster strikes the team inside a claustrophobic maze of caves. Can the leader (Richard Roxburgh) keep his wits about him in the perilous darkness and get those remaining alive back to the surface? Co-produced by James Cameron and based on a true story, this gripping undersea thriller co-stars Rhys Wakefield, Ioan Gruffudd, and Alice Parkinson. 109 min. Widescreen; Soundtracks: English DTS HD 5.1 Master Audio, DVS Dolby Digital stereo, Spanish DTS 5.1; Subtitles: English (SDH), Spanish; audio commentary; deleted scenes; featurettes. Also includes a Blu-ray 3D that requires a 3D television, 3D Blu-ray player, and special glasses to reproduce the original theatrical experience.