UFO Files
Season 1, episode 21: An Alien History of Planet Earth. Playback is hosted by an external player.
Episodes
- Season 1, episode 0UFOs: Then and Now - Cause for Alarm
- Season 1, episode 1Beyond The War Of The Worlds
- Season 1, episode 2Brazil's Roswell
- Season 1, episode 3Britain's Roswell
- Season 1, episode 4UFOs: Then and Now - Aliens and Contact
- Season 1, episode 5Deep Sea UFOs: Red Alert
- Season 1, episode 6Area 51: Beyond Top Secret
- Season 1, episode 7Mexico's Roswell
- Season 1, episode 8Majestic Twelve UFO Cover-Up
- Season 1, episode 9Out of This World
- Season 1, episode 10Alien Engineering Part 1
- Season 1, episode 11Alien Engineering Part 2
- Season 1, episode 12UFO Hunters
- Season 1, episode 13The Gray's Agenda
- Season 1, episode 14China's Roswell
- Season 1, episode 15Deep Sea UFOs
- Season 1, episode 16UFOs: Then and Now - The Innocent Years
- Season 1, episode 17Hangar 18: The UFO Warehouse
- Season 1, episode 18Delete Me
- Season 1, episode 19Delete Me
- Season 1, episode 20Delete Me
- Season 1, episode 21An Alien History of Planet Earth
- Season 1, episode 22Ancient Aliens
- Season 1, episode 23Area 51
- Season 1, episode 24Cattle Mutilations
- Season 1, episode 25UFOs of the 70's
- Season 1, episode 26Britain's X-Files
- Season 1, episode 27Kecksburg UFO
- Season 1, episode 28Roswell: Final Declassification
- Season 1, episode 29Roswell: Roswell Secrets Unveiled
- Season 1, episode 30Real UFOs
- Season 1, episode 31Texas' Roswell
- Season 1, episode 32The Day After Roswell
- Season 1, episode 33Pacific Bermuda Triangle
- Season 1, episode 34UFOs: Then and Now? Cause for Alarm:
- Season 1, episode 35When UFOs Arrive
- Season 1, episode 36Soviet UFO Secrets Revealed
- Season 1, episode 37Then and Now: Nightmare
- Season 1, episode 38UFO Cults
- Season 1, episode 39Ufo Hot Spots
- Season 1, episode 40UFOs and the White House
- Season 1, episode 41UFOs vs. The Government: