Brian Thompson played the villainous Night Slasher in the 1986 film Cobra. His first named role was on Werewolf, a horror series that ran during Fox's inaugural broadcasting year of 1987–1988. Thompson has played several characters in the Star Trek franchise—the most notable being the Klingon Lieutenant Klag in which he informed Riker that “Gagh is always best when served live”, the Alien Bounty Hunter on The X-Files and Eddie Fiori on Kindred: The Embraced. In 2014, he produced, wrote and starred in the B-movie parody The Extendables.