Darkness

Three strangers enter an abandoned silver mine in the Mojave desert in complete darkness. They need to find each other and a way out before succumbing to the psychological effects of light deprivation.

A Marine Reserve, a Navy survival instructor and an engineer battle isolation, hallucination and starvation as they struggle to escape an abandoned Cold War fallout shelter 240 feet underground in California's Mojave Desert.

A firefighter-training officer, a retired bomb technician and a former Green Beret spend six days in complete darkness fighting to find the exit of a treacherous cave system deep underneath the Ozark Mountains.

Three strangers attempt to survive six days in total darkness while navigating a labyrinth of passageways in an underground cave. Extreme isolation, perilous terrain and freezing conditions force one participant into submission.

To escape a cave-mine hybrid system burrowed deep into a mountainside, three strangers must descend nearly a mile in total darkness. Frigid terrain, fatal drop-offs, and poisonous snakes threaten the trio at every turn.

Three strangers enter a cave-mine system deep underground in a remote part of Virginia. They must contend with giant underground waterfalls and a freezing cold lake, on top of the psychological effects of light deprivation.