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.

Four eccentric but passionate investigators search for a mysterious creature called Bigfoot.

Four eccentric but passionate investigators search for a mysterious creature called Bigfoot.

An elite team of investigators use an advanced data algorithm to analyse five decades of Bigfoot sightings to pinpoint when and where to find the elusive beast.

An elite team of investigators use an advanced data algorithm to analyse five decades of Bigfoot sightings to pinpoint when and where to find the elusive beast.

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.

Police officers, paramedics and other first responders reveal their true encounters with the paranormal while on duty. Not only do these cases defy explanation, they terrify even the most seasoned of men and women who have devoted their lives to serve and protect the living.

The Spirit Hunters are a team of paranormal experts. They specialise in rescuing the living from a repetitive type of haunting known as a "ghost loop".

One of the most passionate paranormal teams in America, the Tennessee Wraith Chasers, are in Missouri to investigate a haunted and abandoned asylum.

Museums display the wondrous treasures of the past, and behind each artefact is a story to be told and secrets to be revealed - tales brimming with scandal and mystery, murder and intrigue.