Samuel Stewart "Sam" Witwer is an American actor and musician. He has appeared in individual episodes of numerous television shows as well as minor recurring characters in shows such as Battlestar Galactica, Smallville, CSI: Crime Scene Investigation, and Dexter. He also voiced, and gave his likeness to the main protagonist, Galen Marek/Starkiller, in the Star Wars: The Force Unleashed video game and its sequel. He is also star of the readaptation of BBC's supernatural drama series Being Human on the Sci Fi Channel in the US and in Canada.