Fun fact: Spielvan (1986) had a double bladed lightsaber 13 years before Star Wars did in The Phantom Menace Also, Darth Vader and Emperor Palpatine were partially inspired by Cyborg Hakkaider and Professor Gil of Agent DARK in 1972's Android Kikkaider, which also aired in the U.S. (Hawaii) in 1974, which then explains how George Lucas and his production team found out about it.