Hidden inside the world's castles and mansions are secrets waiting to be revealed. What remarkable tales of mystery and adventure transpired within their walls?

Could there be life beyond our planet? Extraordinary NASA footage and ground-breaking interviews with astronauts and scientists investigate potential sightings of UFOs.

Could there be life beyond our planet? Extraordinary NASA footage and ground-breaking interviews with astronauts and scientists investigate potential sightings of UFOs.

Former Colorado law enforcement officer Chuck Zukowski and his son Daniel investigate UFO-related cases that the authorities usually ignore. They search for definitive proof of UFOs along America’s infamous Alien Highway.

Former Colorado law enforcement officer Chuck Zukowski and his son Daniel investigate UFO-related cases that the authorities usually ignore. They search for definitive proof of UFOs along America’s infamous Alien Highway.

Experts and eyewitnesses try to unlock the mystery of the Alaska Triangle, a remote area infamous for alien abductions, Bigfoot sightings and paranormal phenomena.

Experts and eyewitnesses try to unlock the mystery of the Alaska Triangle, a remote area infamous for alien abductions, Bigfoot sightings and paranormal phenomena.

A team of hardcore hunters are at the ready to help local mountain communities rest more easily when night falls and nature comes out to play.

On The Dead Files, physical medium Amy Allan and retired NYPD homicide detective Steve DiSchiavi combine their unique and often conflicting skills to solve unexplained paranormal phenomena in haunted locations across America.

On The Dead Files, physical medium Amy Allan and retired NYPD homicide detective Steve DiSchiavi combine their unique and often conflicting skills to solve unexplained paranormal phenomena in haunted locations across America.

The Holzer Files is an American paranormal television series following a team of ghost hunters as they investigate cases documented by the late Hans Holser.

Real-life ghost stories in the isolated and frigid Alaskan landscape are explored through captivating interviews and evocative re-creations.

A family are settling into their new home when a neighbour warns them about strange creatures in the woods. What is out there?

They may be known as the first family of darkness, but legendary rocker Ozzy Osbourne and his wife, Sharon Osbourne, are borderline skeptics when it comes to the paranormal. Determined to convert his parents into full-fledged believers, Jack Osbourne shares the craziest, most jaw-dropping supernatural activity ever caught on camera.

Paranormal investigator and documentary filmmaker Steve Shippy is on a mission to solve mysterious hauntings that have consumed a number of American communities.

The Holzer Files is an American paranormal television series following a team of ghost hunters as they investigate cases documented by the late Hans Holser.

Experts and eyewitnesses try to unlock the mystery of the Alaska Triangle, a remote area infamous for alien abductions, Bigfoot sightings and paranormal phenomena.