Power Rangers is an American entertainment and merchandising franchise built around a live-action superhero television series, based on the Japanese tokusatsu franchise Super Sentai. Produced first by Saban Entertainment, second by BVS Entertainment, later by Saban Brands, and today by SCG Power Rangers and Hasbro, the Power Rangers television series takes much of its footage from the Super Sentai television series, produced by Toei Company. The first Power Rangers entry, Mighty Morphin Power Rangers, debuted on August 28, 1993, and helped launch the Fox Kids programming block of the 1990s, during which it catapulted into popular culture along with a line of action figures and other toys by Bandai. By 2001, the media franchise had generated over $6 billion in toy sales.

Despite initial criticism that its action violence targeted child audiences, the franchise has been commercially successful. As of 2019, Power Rangers consists of 27 television seasons of 20 different themed series and three theatrical films released in 1995, 1997 and 2017.

In 2010, Haim Saban, creator of the series, regained ownership of the franchise after seven years under The Walt Disney Company. In 2018, Hasbro was named the new master toy licensee. Shortly afterwards, Saban Brands and Hasbro announced that the latter would acquire the franchise and the rest of the former's entertainment assets in a $522 million deal, with the first products from Hasbro becoming available in early 2019

Since Power Rangers derives most of its footage from the Super Sentai series, it features many hallmarks that distinguish it from other superhero series. Each series revolves around a team of youths recruited and trained by a mentor to morph into the eponymous Power Rangers, able to use special powers and pilot immense assault machines, called Zords, to overcome the periodic antagonists. In the original series Mighty Morphin, the wizard Zordon recruits "teenagers with attitude" against Rita Repulsa.

When "morphed," the rangers become powerful superheroes wearing color-coded skin-tight spandex suits and helmets with opaque visors; identical except in individual rangers' color, helmet design, and minor styling such as incorporating a skirt. Morphed Rangers generally possess enhanced strength, durability, agility and combat prowess. Some possess superhuman or psychic abilities such as super-speed, element manipulation, extra-sensory perception or invisibility. In addition, each individual ranger has a unique weapon, as well as common weaponry used for ground fighting. When enemies grow to incredible size (as nearly all do), Rangers use individual Zords that combine into a larger Megazord.

Rangers teams operate in teams of five or three, with more Rangers joining the team later. Each team of Rangers, with a few exceptions, obeys a general set of conventions, outlined at the beginning of Mighty Morphin and implied by mentors throughout many of the other series: Power Rangers may not use their Ranger powers for personal gain or for escalating a fight (unless the enemy does so), nor may the Power Rangers disclose their identities to the general public.The penalty for disobeying these rules is the loss of their power.

As in Super Sentai, the color palette of each Power Rangers team changes every series.Only Red and Blue appear in every Ranger team, while a Yellow Ranger has been present in every season except Power Rangers Dino Charge. Other colors and designations also appear throughout the series. A Rangers' color designation also influences their wardrobe throughout the series: civilian clothing often matches Ranger color.

The first six seasons (beginning with Mighty Morphin Power Rangers and ending with In Space) followed an overarching, evolving storyline. The second season began the annual tradition of the Rangers acquiring new Zords to battle enemies while the core suits from the first season were used, except for that of the White Ranger. With the fourth season, Zeo, Power Rangers began following the Super Sentai series' practice of annual Ranger suit changes.

Although the seventh season, Lost Galaxy, had ties with the preceding season, it was otherwise the first season to follow a self-contained story, as would later seasons of the show up until the seventeenth, RPM. The season also began the tradition of team-up episodes featuring Rangers, villains, and other characters from past seasons.

Beginning with the eighteenth season, Samurai, the show returned to a multi-season format similar to Mighty Morphin Power Rangers, with self-contained storylines told across two seasons each.

When the evil witch Rita Repulsa and her minions Goldar, Squatt, Baboo, and Finster, are freed from their imprisonment on the Moon, the wizard Zordon, with the help of his assistant Alpha 5, enlists five teenagers—Jason Lee Scott, Trini Kwan, Billy Cranston, Kimberly Hart, and Zack Taylor—to become the Mighty Morphin Power Rangers to battle Rita's invasion of the Earth, using their Power Coins and Dinozords to combat her monsters. Rita soon creates her own evil Power Ranger by brainwashing a recent transfer student Tommy Oliver, but the Power Rangers are able to free him from her control and he joins their side.

Rita's superior Lord Zedd returns to the Earth to take over for Rita's incompetence, imprisoning her once more. His new monsters prove too powerful for the Dinozords, leading Zordon to empower them into the Thunderzords. Tommy eventually loses the Green Ranger powers, but comes back as the new White Ranger and becomes the new leader of the team. Jason, Trini, and Zack leave to join a youth conference in Switzerland, and are replaced by Rocky DeSantos, Aisha Campbell, and Adam Park, respectively, and Rita returns and marries Lord Zedd.

Rita's brother Rito Revolto comes to Earth and destroys the Power Rangers' Power Coins and Thunderzords. The Power Rangers seek out Ninjor, creator of the Power Coins, for new Power Coins giving them new ninja powers and the Ninjazords, and later the Shogunzords. Rita also enchants a new Australian exchange student Kat Hillard into slowly draining Kimberly of her Ranger powers, until the spell is broken; when Kimberly ultimately leaves to train for the Olympics, she entrusts Kat to be her replacement amongst the Power Rangers.

When Rita's father Master Vile comes to Earth, he turns back time, turning the Power Rangers, and many of their friends, into children. Zordon calls upon his proteges the Alien Rangers of Aquitar to protect the Earth from Master Vile's monsters and to help work on a machine that would return the child Rangers to their proper ages. Unfortunately, only Billy returns to normal as the machine which required the power coins as a power source is stolen by Rito & Goldar, allowing Rita & Zedd to destroy the coins. The Ranger Kids then travel throughout time to gather the fragments of the Zeo Crystal to bring time back to normal. During her journey in Africa, Aisha meets Tanya Sloan and realizes that she can do more help to stop the sickness plaguing the wildlife and sends Tanya back with her piece of the Zeo Crystal.

With the Zeo Crystal restored and time brought back to normal, the Rangers are caught off guard when Goldar and Rito steal the crystal and destroy The Command Center. Although Zordon and Alpha are fine and the their headquarters rebuilds itself into the Power Chamber, they warn the Rangers that the Machine Empire is planning on conquering the Earth, and the Rangers must use the power of the Zeo Crystal to become the Zeo Rangers to battle them. Billy decides to uses his scientific prowess to work on the Zeo Zords and other machinery, and his presence in the destruction of the Command Center leaves him unable to receive the powers of the Gold Ranger, Trey of Triforia, but Jason returns instead. Billy soon begins to age rapidly, a side effect from the regenerator he used to return to his normal age, and leaves Earth to be healed on Aquitar.

After Divatox's plans are foiled, she sets her sights on conquering the Earth, with the Turbo Rangers and eventually the intergalactic police officer the Blue Senturion combatting her monsters. Tommy, Adam, Tanya, and Kat soon retire from being Power Rangers, choosing T.J. Johnson, Carlos Vallerte, Ashley Hammond, and Cassie Chan as their replacements, who are also assisted by the Phantom Ranger. Zordon also leaves, putting Dimitria in his place.

After Divatox succeeds in destroying the Power Chamber, she is called off planet to participate in Dark Specter's evil alliance in conquering the universe. T.J., Carlos, Ashley, and Cassie travel into outer space to try to stop him, and meet up with Andros, who they join to become the Space Rangers to stop Dark Specter and his protege Astronema. They eventually awaken Andros' friend Zhane, the Silver Ranger, and free Andros' sister Karone (Astronema) from Dark Specter's control and ultimately use Zordon, captured by Dark Specter, to defeat Dark Specter's armies and free the universe from his control.

The governments of the Earth decide to send out an experimental space colony Terra Venture, on which Leo Corbett stows away to join his brother Mike on the journey to find new planets. When it encounters a wormhole on the Moon, Leo, Mike, Kai Chen, and Kendrix Morgan go through it and encounter Maya and her planet Mirinoi which is under attack from Scorpius and his minions, led by Trakeena. After Leo, Mike, and Kendrix are stranded, Kai commandeers the Astro Megaship along with its mechanic Damon Henderson to save them. Mike, Kai, Damon, Maya, and Kendrix are chosen by the Quasar Sabers to fight Scorpius, but Mike seemingly falls to his death, leaving Leo to act as the leader of the Galaxy Rangers in his stead back on Terra Venture. Mike later returns after it is revealed the Magna Defender has been using his body as a vessel to fight Scorpius' monsters along with the Galaxy Rangers. Mid-season, Deviot revives the Psycho Rangers and the space rangers come to help. Kendrix ultimately dies while saving the Pink Space Ranger, Cassie and is replaced by Karone. They later must fight Captain Mutiny and his space pirates after they are transported to the Lost Galaxy.

Carter Grayson, Chad Lee, Joel Rawlings, Kelsey Winslow, and Dana Mitchell are hired by Operation Lightspeed to protect Mariner Bay from a group of evil demons led by Queen Bansheera from taking over the world by fighting as the Lightspeed Rangers. They are later joined by Dana's long lost brother Ryan.

When the mutant Ransik and his daughter Nadira escape custody of the Time Force police in the year 3000 by stealing the very prison, they travel back in time to 2001, but not before seemingly killing the Red Time Force Ranger Alex. His subordinates Jen Scotts, Lucas Kendall, Katie Walker, and Trip travel back in time to 2001 and seek out Alex's ancestor Wes Collins, as his DNA unlocks the Time Force Morphers, allowing all of them to become the Time Force Power Rangers to recapture the mutants Ransik uses to thwart them and stop the Bio-Lab who ended up creating him. They are ultimately joined by Eric Myers, who uses the Quantum Morpher and Q-Rex to fight

Jungle man Cole Evans, Air Force pilot Taylor Earhardt, would-be pro-bowler Max Cooper, florist Danny Delgado, and martial artist Alyssa Enrilé are chosen by Princess Shayla of the floating island Animaria to be the Wild Force Power Rangers to fight the evil Orgs. They are later joined by Merrick Baliton, one of the original Wild Force Power Rangers who used a forbidden power to defeat the Master Org 3,000 years in the past, after he is freed from the power in the present.

Shane Clarke, Tori Hanson, and Dustin Brooks are bumbling students of Kanoi Watanabe's Wind Ninja Academy, but when Lothor kidnaps the other students, they are all that remain to protect the Earth from Lothor's evil space ninjas as the Wind Rangers. They are also joined in battle by adopted brothers Hunter and Blake Bradley of the rival Thunder Ninja Academy as the Thunder Rangers and Kanoi's son Cam as the Samurai Ranger.

When the evil Mesogog appears to bring the Earth back to the Mesozoic age, Dr. Tommy Oliver of Reefside reluctantly enlists his students Conner McKnight, Ethan James, and Kira Ford to battle him as the Dino Rangers. Tommy later joins them as a Ranger, once more, as well as Trent Fernandez-Mercer, adopted son of Tommy's once colleague Dr. Anton Mercer, who is Mesogog's alterego.

In the year 2025, the Space Patrol Delta police force protects the galaxy from the Troobian Empire's forces. When their A-Squad of Power Rangers fall in battle, B-Squad members Sky Tate, Bridge Carson, and Syd Drew are joined by rookies Jack Landors and Z Delgado under the direction of Commander Anubis Cruger to be the S.P.D. Power Rangers. They are later joined by Sam, a young boy they save from the Troobian Empire who in the future becomes the Omega Ranger, as well as Cmdr. Cruger as the Shadow Ranger and technical expert Dr. Kat Manx as the Kat Ranger.

The sorceress Udonna enlists the help of Chip Thorn, the Rocca sisters Madison & Vida, Xander Bly, and new guy in town Nick Russell to become the Mystic Force Power Rangers to protect Briarwood and its nearby magical forest from the evil forces of Morticon, who plans on taking over both the magical and human worlds. They are eventually joined by Udonna's old friend Daggeron and his genie Jenji, and Udonna and her long lost husband Leanbow, who has been trapped as the evil Koragg since falling in battle 20 years prior.

Wealthy adventurer Andrew Hartford tasks Will Aston, Dax Lo, Ronny Robinson, Rose Ortiz, and reluctantly his own son Mack to act as the Overdrive Rangers, searching for the jewels of the Corona Aurora before either Flurious or Moltor, and later Kamdor and the Fearcats can. They are later joined by Tyzonn, member of a search and rescue team from the planet Mercuria, who has a past with the Fearcats.

The Pai Zhua, or "Order of the Claw", has protected the world from the evil spirit of Dai Shi for nearly ten thousand years. When Jarrod, Lily Chilman, and Theo Martin are chosen by Master Mao to guard the container of Dai Shi's spirit, Jarrod is deemed unworthy and replaced by rookie or "cub" member Casey Rhodes. Angered by this slight, Jarrod attempts to steal Dai Shi's vessel, only to become possessed by his spirit. Mao, who falls in battle, entrusts in best student R.J. to lead the others as the Jungle Fury Power Rangers to stop Dai Shi from taking over the world. R.J. later joins them in battle, as does Dom Hargan, a former Pai Zhua student who went to find his path in life.

A malicious and rapidly evolving computer virus known as Venjix has ravaged the Earth, leaving the surviving members of humanity to huddle for safety in the force field protected city of Corinth. To stop Venjix's attacks, led by his humanoid warrior Tenaya, the mysterious Doctor K enlists Scott Truman, Flynn McAllistair, Summer Landsdown, and reluctantly Ziggy Grover and the apparent cyborg Dillon as the RPM Ranger Operators. They are later joined by Gem and Gemma, Doctor K's old friends, who were presumed dead during Venjix's attack.

In order to prevent Master Xandred's Nighlok forces from taking over the Earth, Mentor Ji of the Shiba House trains Jayden, Kevin, Mia, Mike, and Emily in the ways of the samurai to fight as the Samurai Power Rangers. They are later joined by Jayden's childhood friend Antonio as the Gold Ranger, who is instrumental in unlocking the group's Super Mode.

In order to prevent Master Xandred's Nighlok forces from taking over the Earth, Mentor Ji of the Shiba House trains Jayden, Kevin, Mia, Mike, and Emily in the ways of the samurai to fight as the Samurai Power Rangers. They are later joined by Jayden's childhood friend Antonio as the Gold Ranger, who is instrumental in unlocking the group's Super Mode.

Zordon's protege Gosei calls on high school students Troy Burrows, Noah Carver, Jake Holling, Emma Goodall, and Gia Moran to become the Megaforce Power Rangers to battle the invasion of the Warstar Empire. They are later joined by the Robo Knight in his fight against the Toxic Mutants.

With the Warstar Empire's forces increasing their invasion, Gosei gives the Rangers new morphers to assume Super Mega Mode, allowing them to call on the powers of all of the previous Power Rangers. They are joined by Orion, a citizen from the planet Andresia.

When an intergalactic bounty hunter comes to Earth looking for the Energems, entrusted to an alien who lost them during the asteroid bombardment that resulted in the extinction of the dinosaurs, the Dino Charge Power Rangers are formed to find the Energems first.

When an intergalactic bounty hunter comes to Earth looking for the Energems, entrusted to an alien who lost them during the asteroid bombardment that resulted in the extinction of the dinosaurs, the Dino Charge Power Rangers are formed to find the Energems first.

The Power Rangers are protecting an item called the Ninja Nexus Prism from the forces of Galvanax, the champion of the universe's most popular intergalactic game show, who wants the Prism, which contains six magical Ninja Power Throwing Stars, to become invincible. The Rangers must master the arsenal of throwing stars, Zords, and Megazords, all made from the titular legendary "ninja steel", to stop Galvanax's warrior contestants sent to Earth to retrieve the Prism, the Steel and the Power Stars for him

The Power Rangers are protecting an item called the Ninja Nexus Prism from the forces of Galvanax, the champion of the universe's most popular intergalactic game show, who wants the Prism, which contains six magical Ninja Power Throwing Stars, to become invincible. The Rangers must master the arsenal of throwing stars, Zords, and Megazords, all made from the titular legendary "ninja steel", to stop Galvanax's warrior contestants sent to Earth to retrieve the Prism, the Steel and the Power Stars for him

Set in the future, a secret agency called Grid Battleforce combines a newly discovered substance called "Morph-X" with animal DNA to create the Power Rangers Beast Morphers team. The Rangers must fight off an evil sentient computer virus named Evox who is bent on taking over the source of all Ranger power, the Morphin Grid itself.[46]

Note: The series serves as a direct sequel to Power Rangers RPM .

Set in the future, a secret agency called Grid Battleforce combines a newly discovered substance called "Morph-X" with animal DNA to create the Power Rangers Beast Morphers team. The Rangers must fight off an evil sentient computer virus named Evox who is bent on taking over the source of all Ranger power, the Morphin Grid itself.^[46]

Note: The series serves as a direct sequel to Power Rangers RPM .

When a threatening army of powerful alien beings is unleashed on Earth, a brand-new team of Power Rangers are recruited to deal with the them.

Power Rangers Hyperforce is set in the year 3016 at Time Force Academy. A team of Time Force Ranger cadets must band together to defeat an ancient evil who is set on unraveling the very fabric of the universe. Under the leadership of their mentor, Jen Scotts, and with the show's Game Master, Malika Lim, the newly minted Rangers will cross both time and space to complete their mission while running into many familiar eras (and faces) along the way.