Samuel Stewart "Sam" Witwer (born October 20, 1977) is an American actor and musician. He has portrayed Crashdown in Battlestar Galactica, Davis Bloome in Smallville, and vampire Aidan Waite of the US/Canadian remake of BBC's supernatural drama series Being Human on Syfy in the US and Space in Canada. He also voiced protagonist Galen Marek/Starkiller in the successful multimedia project Star Wars: The Force Unleashed, as well as The Son and Darth Maul in Cartoon Network's Star Wars: The Clone Wars and  Emperor Palpatine in Star Wars Rebels.