There have been numerous instances in Star Trek where characters have been duplicated: by cloning, transporter accidents, holograms, alternate universes, imposters, and so on. Which characters have met their own duplicate?
For the purposes of this question:
- Star Trek refers to any of its television series or movies. So the Animated Series counts, but comic books do not.
- "Met" means being in the same room (or an equivalent proximity). Seeing each other on viewscreens does not count. Simultaneously swapping places does not count.
- "Duplicate" is another entity played by the same actor, who could be reasonably be mistaken for the original character. So Data and Lore count, but Data and Dr. Soong do not count.
- Please identify the episode or movie.