5. Moloch the Corruptor
Episode: I Robot, You Jane (Season 1, Episode 8) Moloch was a demon whose soul was trapped inside a book by an order of monks in the 15th century. When Willow Rosenberg was studying, she scanned the book's text in to a computer, which set Moloch free in to cyberspace. Finding he had the ability to jump between machines and control any system he entered, Moloch adopted the name 'Malcolm Black' and wooed (pre-lesbian) Willow in a chatroom. He also used his ability to mesmerise to persuade a pair of geeks to be his flunkies and to persuade some scientists from Calax Research and Development to build him a mechanical body to inhabit. When Buffy began to be suspicious of 'Malcolm', Moloch ordered one of the geeks ('Fritz') to kill her, which he obviously failed in doing, whilst also arranging to meet Willow in his new robotic body (which resembled a cross between a Terminator and a Predator). He claimed to genuinely love Willow for freeing him, but tried to kill her after she rejected him. Rupert Giles and Jenny Calendar attempted to trap Moloch back in the book, but failed - only managing to sever his connection to all of the information on the internet - so it was down to Buffy to physically challenge Moloch. Buffy couldn't hurt him due to him being made of metal, so was forced to trick him in to punching a circuit breaker, which overloaded his robotic body and disabled him once and for all.