Nurith NupurMichael Dorn as Lt. Worf
No one has contributed to the series as much as Michael Dorn did with his character Worf. He made his appearance in the very first episode of the series Star Trek: The Next Generation. Since the conclusion of the series he also worked on Deep Space Nine. He has acted on an impressive 272 Episodes of the show and on top of that 4 movies too. To this day he can be seen acting in movies and tv shows.