Four athletically able teenagers along with their brainy friend Billy are selected by Zordon to fight the evil of Rita Repulsa, her monsters and her minions after the witch is accidentally released from imprisonment in an intergalactic dumpster on the moon. Later in the series, the rangers are joined by Tommy, the once evil Green Ranger designed for Rita's evil, but later was deprogrammed and spent two portions of the series briefly as the Green Ranger. Over time, some rangers had to pass their powers to others as well. Action scenes and scenes with Rita were edited from footage based on Japanese action sagas. Replacement villain Lord Zedd was designed in the U.S.

In the episode "Trick or Treat", Skull has the numbers "24601" tattooed on his chest. This is reference to Jean Valjean's prison number in Les Miserables (also used by Seymour Skinner and Sideshow Bob in "The Simpsons" (1989), Hank Jennings in "Twin Peaks" (1990).

Ninjor:
"Older than time itself, Man has always known the calling. Light of the light, strength of the soul, ignite this eternal power inside of me. I am Ninja! I am pure of heart, body, mind, and spirit. Join with me now as I become one with the Power of Ninja!"

Revealing mistakes: In episode 72, "Green No More Part I", Lord Zedd has captured the rangers in an energy field, while he walks around gloating. Duct tape is visible on his staff just below the "Z" presumably broken during rehearsal because it is used to fight a powerless Tommy later.

(theme song)
Performed by The Mighty RAW
Written and Composed by Ron Wasserman