"Tuvix" is the 40th episode (24th in the second season) of the science fiction television program Star Trek: Voyager. The episode originally aired on May 6, 1996, and tells the story of Tuvok and Neelix being merged into a unique third character named Tuvix. "Tuvix" was well received by fans and critics, earning generally positive reviews. Researchers and critics found "Tuvix" teeming with technical and philosophical content, including thematic ties to other episodes in the Star Trek canon, real-world logical and metaphysical ramifications, and scientific concessions for the story.