Superman

Superman is the name given to a superhero created and published by DC Comics since 1938. An alien named Kal-El from the destroyed planet Krypton, was sent to the planet of Earth and raised as Clark Kent by two human foster parents; Martha and Jonathan Kent. Once he was an adult, Superman became the protector of Earth, working at the Daily Planet as Clark Kent along side his partner and wife Lois Lane.

In Destined
When Prue Halliwell was three years old, she conjured Superman from most likely the TV. Its unknown if he was immediately de-conjured or if he escaped the Halliwells and into the city of San Francisco, like the dragon Wyatt conjured had done.

Notes and Trivia

 * Its possible the Cleaners had came but only if Superman had escaped the Halliwells and into the mortal world and if magic had been exposed. However there is no known information regarding the events that day, except that Prue conjured the superhero.