World's Most Unexplained

Experts investigate why a Los Angeles hotel has become a magnet for death and if an ominous flight number associated with multiple aviation disasters is cursed.

Experts investigate the 1961 alien abduction of Betty and Barney Hill. They then explore past life regression and the possibilities of reincarnation.

Experts debate whether spontaneous human combustion is a real medical phenomenon or an unlikely accident. They then investigate a mass sighting of UFOs in a quiet seaside town in 1977.

Experts investigate claims of paranormal activity at a Louisiana plantation and the death of rock 'n' roll superstar Elvis Presley.

Experts investigate claims of extraordinary paranormal activity at the White House and the mysterious disappearance of controversial union leader Jimmy Hoffa.

Experts investigate the otherworldly origins of crop circles and a never-ending stream of ghost sightings in a picturesque English town.