A transporter accident fuses two crewmates into one and Janeway has to make a decision.
A transporter accident combines Tuvok and Neelix into a single new person, who has the memories and abilities of both. As the crew gets used to him, he becomes a trusted member of the crew, but the search for a way to reverse the accident raises a painful ethical problem.
The episode is among the most debated of the series, because Janeway faces a decision about whether the life of the new being matters more than the lives of the two men who were lost. Fans still argue about the choice, and the story is one of the best-known moral dilemmas in Star Trek.