Ancient Aliens: Special Presentation — Season 1, Episode 10: Gone without a Trace

Episode synopsis

Tens of thousands of individuals go missing every year and many are never found. But this is not a new phenomenon. Throughout history, ships and planes have mysteriously vanished mid-journey--and entire civilizations, communities, and tribes have seemingly disappeared from the face of the Earth without a trace. Might there be a connection between all these missing person cases--one possibly involving otherworldly portals and even extraterrestrial beings?

About Ancient Aliens: Special Presentation

These special compilation episodes of "Ancient Aliens" explore the controversial theory that extraterrestrials have visited Earth for thousands of years.

More episodes from Season 1

• E1Aliens and Human Evolution
• E2Aliens and Strange Creatures
• E3Aliens and Unexplained Engineering
• E4Aliens and Lost Civilizations
• E5Aliens and the United States
• E6Mysteries of the Outer Realms
• E7Alien Codes and Messages
• E8Energy Lines and Hot Spots
• E9Aliens and the Superhuman Mind
• E11Mission to Outer Space
• E12The Global Connection
• E13Strange Visitors