Experts investigate the abduction of Betty and Barney Hill; new evidence surfaces about abductee Travis Walton; there may be an earthly explanation for the Mothman.
New theories about the Mantell UFO incident are revealed; scientific evidence may explain a UFO encounter in Texas; experts investigate what really crashed into a Canadian harbor.
Experts investigate the mystery of the Bermuda Triangle; researchers seek answers about strange sightings in Massachusetts; a murderer may be responsible for a string of unexplained disappearances in Bennington, Vt.
Three incredible stories that could spell the end of human life on Earth: Decoding ancient Mayan texts, a physicist predicts a super-volcano will destroy the world in 2012; a NASA scientist believes a deadly solar storm is headed our way; and, one of the world's greatest minds makes a startling prediction about a sinister robot takeover.
Three stories of mysterious creatures that are seemingly half-man and half-beast: a New Jersey woman and her son come face to face with the legendary Jersey Devil; a sleepy South Carolina town is terrorized by a giant reptile; in Wisconsin, a bloodthirsty werewolf-like creature appears on a remote country road.
In blacked-out London four young women are murdered - just like Jack fifty years before; when two flights disappear without a trace, the legend of the Bermuda Triangle begins.
The Germans hear that Polish forces are fighting alongside a huge bear; tales of this beer-swilling, chain-smoking beast terrify them - but incredibly the stories are true.
In the summer of 1952, stories of U.S. Air Force jets chasing UFOs over the White House knock the Korean War off the front pages of newspapers; as rumors spread, President Harry S. Truman demands to know what was flying over his house.
In 1978, UFO enthusiast Paul Bennewitz claims he's intercepted extraterrestrial messages; military officials send counterintelligence officer Richard Doty to feed Bennewitz lies, questioning whether Doty himself is a pawn in an even bigger scheme.
Lt. Ryan Graves and pilots in his squadron detect and engage with UFOs on multiple occasions; he gave a detailed description of regular encounters that flight teams had with a black box UFO they were seeing every day.
A look at a series of metal cubes seen spinning in the sky over Earth; exploring the origin of an angel-shaped apparition; China's interest in aliens; a metal alloy that may power UFOs; scareships.
A mysterious doorway on Mars; victims of a UFO in the Amazon; an alien party crasher at the Queen's Jubilee in London; animal mutilations in France; a video of otherworldly visitors to Turkey.
Fending off a swarm of aggressive UFOs with a U.S. warship; an alien voice takes over a British TV broadcast; an Australian teacher who was threatened after a UFO sighting at school; exploring who the Men in Black really are.
George Adamski, a controversial ufologist famous for his flying saucer photos, faces skepticism and belief; his photos, still debated, may support his claims of meeting a man from Venus.