The series that began the Power Rangers' franchise, Mighty Morphin Power Rangers, began broadcasting as part of the Fox Kids group of programs that aired on the Fox network. It lasted for three seasons (from 1993 to 1996). The franchise has continued, and as of today, has consisted of 17 television seasons, 15 different series, and two theatrical films. The latest series, Power Rangers: RPM, debuted on March 7, 2009.

A Power Ranger, "morphs" from a person into a powerful superhero — generally wearing a color-coded battle suit usually made of spandex or other skin-tight material and a helmet with an opaque visor.[6] In many cases, the helmet serves to protect his or her secret identity. A morphed Ranger generally possesses superhuman strength, durability, and ability in hand-to-hand combat.

The Power Rangers may not use their Ranger powers for personal gain or for escalating a fight, which explains why the Rangers do not simply crush the small monsters by means of their Megazord. Nor may the Power Rangers disclose their identities to the general public, barring extenuating circumstances. The penalty for disobeying these rules would be the loss of their power.

This live-action children's series was originally produced by Saban Entertainment, as an Americanization of the tokusatsu Super Sentai Series.