Though claims of extraterrestrial encounters have long been dismissed, many believe the existence of UFOs is not just likely, but a certainty.
Project Blue Book Unknown
The White House Cover Up
Code Name Aurora
Hacked and Leaked
Secret Soviet UFO Research
After Disclosure
UFO Europe: The Untold Stories
NASA's Unexplained Files
Close Encounters
Encounters
Unidentified: Inside America's UFO Investigation
Beyond: UFOS and the Unknown
Encounter: UFO
UFO
Investigation Alien
Hangar 1: The UFO Files
Evidence of the Unexplained
The Manhattan Alien Abduction
UFOs Declassified
Raël: The Alien Prophet
In Search of Aliens
UFO
Les portes du futur
Unsolved Mysteries
The Secret of Skinwalker Ranch
Ummo: La España alienígena