Tuvok is a fictional character from the television series Star Trek: Voyager. He serves as the ship's chief of security and tactical officer. Tuvok is a Vulcan, known for his logical thinking and emotional restraint, which are characteristic traits of his species. He is portrayed by actor Tim Russ. In the series, Tuvok is a former Starfleet officer who has a deep commitment to his duties and the principles of Starfleet. He often provides guidance to the crew, using his wisdom and experience. Tuvok's character explores themes of loyalty, duty, and the balance between logic and emotion.