The origin story of Superman, DC Comics' most popular franchises, is a theme that has been explored and revised often throughout the many years of continuity. Although the details have notably varied in each retelling, common themes remain the same. Superman is rocketed from the doomed planet Krypton to Earth, where he is found and raised by a kindly couple in Smallville, Kansas. Growing up, he develops super-powers and travels to the city of Metropolis where he becomes Superman to protect the people.