Ancient Aliens: Season Four [3 Discs]

"The fourth season of Ancient Aliens speculates that extraterrestrial beings may have been involved in the sudden disappearance of the Mayans, and what may have accounted for the sudden spike in UFO sightings during the disastrous 2011 tsunami in Japan. The show also studies evidence suggesting NASA may be hiding information that could substantiate many individual stories of alien abduction. Includes 10 episodes."