The fifteenth anniversary season of Power Rangers, taken from GoGo Sentai Boukenger. Legends speak of the Corona Aurora, the Crown of the Gods; an ancient jeweled relic with inconceivable power. According to the myths, millennia ago, two brothers warred with each other in their pursuits of the crown, only for the crown to turn them both into monstrous forms and seal them into planets. Afterward, the crown was taken and its jewels removed, all being sent away to an Insignificant Little Blue Planet...In the present day, Adventurer Archaeologist Andrew Hartford has at last found the crown - but the discovery frees the brothers, Moltor and Flurious, from their respective prisons. Realizing that they and other villains would come seeking the crown's power, Hartford uses his wealth to assemble and equip a team to track down and claim the crown's five gemstones before they fall into the wrong hands.Operation Overdrive has a few quirks compared to a usual Ranger season. For one thing, instead of using mainly self-contained Monster of the Week adventures, the season tracked the Rangers and villains as they followed a trail of clues around the world to the location of the jewels. It also had a Big Bad Ensemble instead of just one Big Bad, and they tended to fight each other as much as they fought the Rangers.One of the more interesting episodes was the 15th Anniversary special "Once A Ranger" where a new villain comes into play, the son of Rita Repulsa and Lord Zedd, Thrax. Targeting the Morphing Grid itself, they manage to cut the Operation Overdrive Rangers off from their powers. To stop their plan of decimating the entire grid and eliminating all Power Rangers, the Sentinel Knight commissions Rangers from previous seasons to form a new team (all of the Disney-era shows, with one before they took over) Xander Bly, Bridge Carson, Kira Ford, Tori Hanson, and Adam Park (most characters were Ensemble Darkhorses, the return of Johnny Yong Bosch especially was appreciated). In addition, Alpha Six takes on a role. The two-parter involves the Operation Overdrive Rangers worried about being replaced. While not quite as popular as "Forever Red," "Once A Ranger" has far fewer continuity snarls in part because of Sentinel Knight's involvement.Despite this, Operation Overdrive has a massive negative reputation among the fans, even among the Disney Era seasons. The shift in the overarcing plot was a large departure from traditional Power Rangers fare (which naturally caused some negative feelings due to it being different), the acting was a far cry from the quality set by SPD and Dino Thunder (though it wasn't as bad as some past and future seasons), the late-season Jerkass qualities by Mack due to The Reveal were rather inconsistent and unfounded, and the theme song was pretty terrible. Thanks to all of this, this commonly is on many "Worst Season" lists.It should be noted that while ratings for this season started out good, the ratings would go on to crash and burn - a trend that the twofinal Disney seasons never really recovered from.Succeeded by Power Rangers Jungle Fury.Has a character sheet.
Who are, notably, not actually dead, per se. But they pulled a Heel-Face Turn and he didn't, so they're dead to him.
Well, their Heel-Face Turn was forced onto them by Zordon's good energy. So, technically, the good guys "killed" who they once were, and what they were clearly like when Thrax was born, given his appearance.
Lotus-Eater Machine: The "Home and Away" two-parter has Tyzonn put into one of these by Crazar. He's made to believe that his fiancé is still alive, he was never mutated into a Lava Lizard, and the entire season never took place.
Mythology Gag: All of Boukenger's monsters were homages to previous seasons' Humongous Mecha. It doesn't fully translate to Operation Overdrive, between homages to seasons that never made it overseas and American-designed monsters that don't homage anything, but still.
The One With Mjolnir seems to have one involving actual mythology: One Norse tale has Thor crossdressing and posing as Freya to get Mjolnir back. Operation Overdrive has Ronny posing as Freya Spencer crossdressing and posing as Ronny-as-Freya to get Mjolnir back.
Nerdgasm: In-universe example — Ronny seems to have a "zordgasm" seeing the zords for the first time. And then another one when she checks out the Drill Blaster. All for the sake of adapting Natsuki's genkiness into her...
One-Winged Angel: Almost all the villains. Flurious gets the funky chess-piece-looking thing, Miratrix becomes a giant monster bird, the Fearcats get their armored forms, and Kamdor... uh... opens his face mask to reveal another one. Hey, they can't all be winners. But if we don't count Norg as a real villain, Moltor is the only Overdrive villain who never gets an upgrade. Then again, you might consider his usual form the upgrade of his apparently-human form from flashbacks.
Our Ghosts Are Different: Brownbeard's ghost has the standard ghostly abilities of turning invisible and possessing someone, but he can also conjure a sword from out of thin air, and seems to be solid most of the time, being able to hold objects, and can even be put at risk from a monster attack.
Our Homunculi Are Different: The Fearcats create a giant homunculus called "Agrios" by combining three relics within the Octavian Chalice.
10-Minute Retirement: The Rangers, ALL of them, after fully reaching their Despair Event Horizon (having to be saved by veteran Rangers) decide to go back to their lives (save for Mack) in the first part of "Once A Ranger".
Time Abyss: Power Rangers has long had aliens who talked about thousands of years ago as if it was yesterday, but the Sentinel Knight takes the cake: the continents were one when he scattered the jewels, which means he was known to be active 250 million years ago, and lived until at least a few years back when he sealed Thrax; doubtlessly a series record.
You Look Familiar: Subverted; Kelson Henderson returns yet again, as confirmed in the opening credits, but thanks to the Yeti suit and yet another vocal characterization (he's Norg), it's impossible to recognize him.
Younger Than They Look: Mack, being an android, has had the physical appearance of a 17 or 18 year old since his 'birth' (or in his case, design).