Sam Witwer (born October 20, 1977) is an American actor and musician. He is known for playing Crashdown in Battlestar Galactica, Davis Bloome in Smallville, Aidan Waite in Being Human, Mr. Hyde in Once Upon a Time, and Ben Lockwood in Supergirl. He has voiced Starkiller in Star Wars: The Force Unleashed, the Son in Star Wars: The Clone Wars and Emperor Palpatine in Star Wars Rebels. He has voiced Darth Maul in The Clone Wars, Rebels and Solo: A Star Wars Story. In 2019, he joined the cast of Riverdale as Jughead Jones’ school teacher Mr. Rupert Chipping. Witwer voiced protagonist Deacon St. John in the game Days Gone released in 2019 by Bend Studio.