Power Rangers is a long-running American entertainment and merchandising franchise built around a live action children's television series featuring teams of costumed heroes. the series took its initial premise and much of its footage from the Japanese tokusatsu Super Sentai franchise. Its first entry, Mighty Morphin Power Rangers, debuted on August 28, 1993, Despite initial criticism for its action violence targeted for children, the franchise has continued, and as of 2009 the show consists of 17 television seasons, 15 different series, and two theatrical films. The last new series, Power Rangers: RPM, ended on December 26, 2009. In 2010, the original series was rebroadcast in lieu of a new series utilizing footage from the 2009 Super Sentai television series. On May 12, 2010, it was announced that Saban bought back the rights to the franchise and has plans to premiere the 18th season with 20 new episodes on the Nickelodeon network.
Rangers regularly operate in teams of five, with a special sixth Ranger frequently joining the team part way into the series. More recently a core team of three will later expand to include additional Rangers. Each Ranger's suit and energy spectrum will match a specific color, with red, yellow, and blue joined by some combination of pink, green, black, or white. Rangers may take their names fom their respective colors (Red Ranger, Blue Ranger, etc.) but sometimes also use numbers or other names. There is usually no more than one Ranger of a given color on a team, but exceptions of this rule are generally given alternate names (in Time Force, there were two Rangers with red-colored costumes; the first was the Red Time Force Ranger, the second was the Quantum Ranger). Each team's costumes are nearly identical aside from color and helmet design (most notably the shape of the opaque visor) and perhaps a numerical designation. Any additional Rangers will regularly have additional costume modifications, usually some form of altered suit design and/or armor.
In mid-2010, Haim Saban's Saban Brands bought the Power Rangers franchise back from Disney and will air a new eighteenth season of Power Rangers on Nickelodeon in Spring 2010 with the previous 700 episodes being rerun on Nicktoons. It was also announced that Saban plans to make a new Power Rangers movie.