Rats (2003)

In the year 2035, convict James Cole reluctantly volunteers to be sent back in time to discover the origin of a deadly virus that wiped out nearly all of the earth's population and forced the survivors into underground communities. But when Cole is mistakenly sent to 1990 instead of 1996, he's arrested and locked up in a mental hospital. There he meets psychiatrist Dr. Kathryn Railly and the son of a famous virus expert who may hold the key to the Army of the 12 Monkeys; thought to be responsible for unleashing the killer disease.

After witnessing a bizarre, traumatic incident involving a patient, Dr. Rose Cotter starts experiencing frightening occurrences that she can't explain.

An Oxford Medical School graduate takes a position at a mental institution and soon becomes obsessed with a female mental patient, but he has no idea of a recent and horrifying staffing change.

A boy named Eli with a rare autoimmune disorder is confined to a special experimental clinic for his treatment. He soon begins experiencing supernatural forces, turning the supposedly safe facility into a haunted prison for him and his fellow patients.

A woman is sent to a mental institution after stabbing her classmate in an attempt to conjure an evil spirit called, Mercy Black. Fifteen years later she's released, and must save her nephew, who has become obsessed with the phenomenon.

An orphaned girl is rescued from a satanic ritual and taken to Saint Catherine Institute for homeless youth. There she will learn new skills while facing demons that stalk her.

Haunted by memories of a patient's death, a nurse takes a job at an antiquated hospital for children. Soon she learns that the kids fear a ghost that prowls the floors and will not allow anyone to leave. Amy tries to protect them and convince the other staffers of the evil that lurks there.

An ex-cop and his family are the target of an evil force that is using mirrors as a gateway into their home.

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.

In the middle of a routine patrol, officer Daniel Carter happens upon a blood-soaked figure limping down a deserted stretch of road. He rushes the young man to a nearby rural hospital staffed by a skeleton crew, only to discover that patients and personnel are transforming into something inhuman. As the horror intensifies, Carter leads the other survivors on a hellish voyage into the subterranean depths of the hospital in a desperate bid to end the nightmare before it's too late.