6. Alien Autopsy
This is probably the most famous hoax of all and supposedly shows the autopsy of a grey alien who crashed to earth. The movie was released in 1990 by a London-based entrepreneur called Ray Santilli and was marketed as bona fide footage of an extraterrestrial who crashed at Roswell. But it was later exposed as a huge hoax, after allegedly making its owner a tidy sum.
The footage was broadcast to more than 30 countries and is one of the best-known attempts to fool the public with a fake alien.
