Smallville Cast: Where Are They Now?
4. Sam Witwer
Sam Witwer was perhaps Smallville's most memorable one-off as he appeared only in Season 8 as the show's answer to Doomsday. However, he would make a career out of playing troubled characters as, soon afterwards, he co-headlined the U.S. version of Being Human, taking on the role of conflicted vampire Aidan White for four seasons.
Being a massive Star Wars fan, he's also been gifted with multiple opportunities to voice characters in the the franchise's various films, TV shows and video games.
As of recently, he's returned to The CW, playing a major role in Supergirl's fourth season as its primary villain Agent Liberty. He also recently recurred on Riverdale's fourth season as the troubled but charismatic teacher Mr. Chipping.