Ancient Aliens (2010)

S21E3 The Top Ten UFO Crashes

Ancient Aliens explores a countdown of the ten most intriguing UFO incidents documented worldwide. This includes a peculiar acorn-shaped vessel that fell in the forests of Pennsylvania, a strange craft that appeared on the shores of Japan, and a seismic crash in Britain that remains shrouded in mystery. Do these enigmatic occurrences serve as evidence of extraterrestrial visits to our planet?