This two-hour primetime special reports on the entire scope of the UFO experience -- from the first famous sighting by Kenneth Arnold in 1947 to the present day.
The program draws on interviews with police officers, pilots, military personnel, scientists and ordinary citizens who give extraordinary accounts of encounters with the unexplained.
Also included are the voices of professional skeptics about UFOs, including scientists who are leading the search for life forms beyond Earth elsewhere in the universe.
The program explores the facts behind the enduring mystery of the incident at Roswell, N.M., and looks into the strange stories of alien abductions.
Watch the full documentary now