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Mass UFO sightings from the last 50 years fuel a global mystery in this docuseries featuring eyewitness accounts, expert interviews and new evidence.
2017
7.5
2023
6.5
2006
8.6
2020
6.9
2022
6.7
8.5
2015
10.0
2014
8.2
2.0
2008
2012
7.0
7.8
1998
0.0
2005
1988
5.5
1997
1968
7.7
7.6
2021
2019
8.4
8.9
2013
8.3
2010
8.1
2016
8.0
2007
7.9
2011