The ghost of a naked woman is said to be connected to a mother and son who disappeared. And the story of a police helicopter is speculated to have come into contact with a UFO.

A family claims they are harassed by a malevolent poltergeist in their new home. Then, a former deputy sheriff tells the tale of sighting he could not identify while alone in the Oregon wilderness.

In the series premiere, a five-year-old girl claims to have a friendship with a ghost named Emily. Next, a mother and daughter describe their experiences on a dirt road.

A group of paranormal investigators become trapped in an abandoned haunted hospital.

S5/E13: What's scarier ... slamming doors or a ghost in the elevator? You decide.

S5/E12: Alien abuction is no fun.

While vacationing, a couple is abducted by aliens and subjected to horrific experimentations.

S5/E11: Never have your wedding at a haunted hotel.

When guests flee an old Victorian hotel, the owners must confront its chilling history. Will they unearth the truth before a bride's fairytale wedding is ruined by the hotel's ghostly watchman?

S5/E10: Someone - or something - is telling an inmate to kill herself.