Stardate: 1254.4--While exploring near the center of the galaxy, the U.S.S. Enterprise stops at Megas-Tu, a planet where magic and witchcraft are the norm, and their guide is Lucien, who is Lucifer of Earth mythology.
original airdate--October 27,1973
Alien Races: Megans
Starships: U.S.S. Enterprise NCC-1701
Goofs: When the Megans attack the Enterprise, McCoy is seen wearing a yellow command uniform during one shot.
Trivia: In the original script, the crew meet God. NBC objected to any reference to God. The producers changed God to the Devil and NBC accepted it.