Lois & Clark: The New Adventures of Superman Season 3 Episode 22

After being approved in Zara and Ching’s tests, Superman learns that they want him to leave the Earth (and Lois) and go back with they to rule New Krypton, or the planet will be ruled by the evil Lord Nor, who has sent an assassin to kill Clark. When Clark defeats the assassin, he and Lois decide that he must go with Zara and Ching. Superman says goodbye to his parents, to Earth and to Lois, and leaves with Zara and Ching.