A crew from a paranormal reality television show lock themselves in a haunted psychiatric hospital. They search for evidence of paranormal activity as they shoot what ends up becoming their final episode.

When a team of explorers ventures into the catacombs that lie beneath the streets of Paris, they uncover the dark secret that lies within this city of the dead.

A young woman in Paris goes to a party in the enormous labyrinth of limestone tunnels beneath Paris. When she becomes separated from her friends, she is convinced something is chasing her through the dark tunnels.

When a huge hurricane hits her hometown in Florida, Haley ignores evacuation orders to look for her father. After finding him badly wounded, both are trapped by the flood. With virtually no time to escape the storm, they discover that rising water levels are the least of their problems.

Father and son coroners receive a mysterious unidentified corpse with no apparent cause of death. As they attempt to examine the beautiful young "Jane Doe," they discover increasingly bizarre clues that hold the key to her terrifying secrets.

A Spanish orchestra conductor deals with the mysterious disappearance of his girlfriend.

Four teenage girls go on a diving adventure to explore a submerged Mayan city. Once inside, their rush of excitement turns into a jolt of terror as they discover the sunken ruins are a hunting ground for deadly great white sharks. With their air supply steadily dwindling, the friends must navigate the underwater labyrinth of claustrophobic caves and eerie tunnels in search of a way out of their watery hell.

Two sisters on Mexican vacation are trapped in a shark observation cage at the bottom of the ocean, with oxygen running low and great whites circling nearby, they have less than an hour of air left to figure out how to get to the surface.

The true story of mountain climber Aron Ralston's remarkable adventure to save himself after a fallen boulder crashes on his arm and traps him in an isolated canyon in Utah.

Премьера состоялась на кинофестивале «Сандэнс» 23 января 2010 года. В США фильм вышел в ограниченный прокат 24 сентября 2010 года, а широкий — 29 октября. В России премьера состоялась 14 октября 2010 года[4].

Distraught, confused, and half-wild with fear, Sarah Carter emerges alone from the Appalachian cave system where she encountered unspeakable terrors. Unable to plausibly explain to the authorities what happened - or why she's covered in her friends' blood - Sarah is forced back to the subterranean depths to help locate her five missing companions.

After a tragic accident, six friends reunite for a caving expedition. Their adventure soon goes horribly wrong when a collapse traps them deep underground and they find themselves pursued by bloodthirsty creatures. As their friendships deteriorate, they find themselves in a desperate struggle to survive the creatures and each other.

The final candidates for a highly desirable corporate job are locked together in an exam room and given a test so simple and confusing that tension begins to unravel.