Worf, son of Mogh is a fictional character in the Star Trek franchise, portrayed by actor Michael Dorn. He appears in the television series Star Trek: The Next Generation, seasons four through seven of Star Trek: Deep Space Nine, and the third and final season of Star Trek: Picard, as well as the feature films Star Trek Generations, Star Trek: First Contact, Star Trek: Insurrection, and Star Trek: Nemesis. From Wikipedia
