Journalist Christer Holmgren believes he has uncovered the identity of one of history's most notorious serial killers, Jack the Ripper.

An investigation into the number of unexplained plane crashes in the Sierra Nevada.

Examining one of the most enduring myths, the mystery of Big Foot, who eyewitnesses claim is up to 10 feet tall and covered in foul-smelling, brown fur.

An investigation into the Loch Ness Monster, through historical sightings reports, discussions on theories, and archival photos and footage.

Examinations of the theory that Marilyn's death might have been a murder.