Giorgio Tsoukalos takes a look back at the top 10 reports of encounters with strange and mysterious beasts that have been investigated on "Ancient Aliens."
Director:
Mitch Marcus
Cast:
Robert Clotworthy
Giorgio Tsoukalos
Erich von Däniken
David Childress
William Henry
Linda Moulton Howe
David Wilcock
Jonathan Young
Jason Martell