[@Lmpkio] In the universe Tor-6, clones of people were created to be used as mass, cheap slave labor. Some of these clones in fact managed to escape, and form a rebellion. Currently, the clones have been sent from their universe into a new universe. Also, not all clones look the same, as wraith said. There are many sub-species in the clone group, but they all identify as clone, rather than their biological species.