Clarence John Brown III born January 5 1959 is an American film television and voice actor He is known for his roles as the Kurgan in Highlander 1986 Captain Byron Hadley in The Shawshank Redemption 1994 Sergeant Charles Zim in Starship Troopers 1997 Brother Justin Crowe on the HBO series Carnivàle 20032005 Waylon Jock Jeffcoat on the Showtime series Billions 20182019 and Stanley Thomas in Promising Young Woman 2020 His voiceover work includes Lex Luthor in the DC Animated Universe and various unrelated DC media Doctor Neo Cortex in the Crash Bandicoot franchise 19972003 Mr Krabs on SpongeBob SquarePants 1999present Surtur in Thor Ragnarok 2017 and Lt Hank Anderson in Detroit Become Human 2018