The Power Rangers have been a popular children's television show since 1993 - the series more recently shown include Power Rangers Operation Overdrive, Power Rangers Jungle Fury and Power Rangers R.P.M. A Power Ranger "Morphs" from a person into a powerful superhero wearing a colour coded battle suit and a helmet with an opaque visor, hiding their real identity, which the Power Rangers cannot expose.  The Power Rangers work in teams, again defined by their colour coded suit. In each episode the Power Rangers have to battle a new monster and save the world!