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Red Alert

Episode number: 1

Overview: UFO sightings over nuclear facilities trigger high alert responses - are they top-secret aircraft or something from another world?

Black Triangles

Episode number: 2

Overview: An investigation into triangular-shaped UFOs seen in the 1980s and 90s - they might be the best evidence of extraterrestrial crafts?

Battle of Los Angeles

Episode number: 3

Overview: Anti-aircraft guns blast the skies over Los Angeles when an unknown flying object is spotted by thousands in 1942 - is it from earth or could it be extra-terrestrial?

UFO Crash Sites

Episode number: 4

Overview: Roswell is the most famous UFO story in history and a piece of debris found at the desert crash site might shed new light on what really happened in 1947.

Shoot 'em Down

Episode number: 5

Overview: True stories of fighter pilot encounters with unidentified flying objects in our skies – including pilots who were ordered to ‘shoot ‘em down’.

UFOs vs. Airliners

Episode number: 6

Overview: Well-documented sightings of UFOs by commercial airliner pilots may be proof of danger lurking in our skies.