Sam Witwer is an American actor and musician who has played a variety of roles in sci-fi series and the Star Wars saga. He's known for his voice acting, including Darth Maul in animated Star Wars and Deacon St. John in Days Gone. Witwer's live-action roles include Crashdown in Battlestar Galactica, Doomsday in Smallville, Mr. Hyde in Once Upon a Time, and Ben Lockwood in Supergir