Many spectacular UFO sightings across the USA, Canada, Europe or South America have remained unexplained despite serious and thorough investigations. This episode makes public some of the unclassified files from these UFO investigations.
This investigative series takes a definitive, scientific look at the search for unidentified flying objects, documenting UFO stories that have been debunked and bringing viewers up-to-date on the state of the most famous UFO investigations, many of which still remain unresolved and unexplained to this day.
