After travelling to Earth, space pirate Divatox abducted an alien wizard named Lerigot to use his magical key to go to Muranthias and free her fiance Maligore. The Rangers weren't about to let this happen, and so they upgraded to Turbo Powers, since the Zeo Powers wouldn't be enough to take on Maligore.
Practicing for a martial arts tournament, Rocky injured his back, and later sent Justin in his place to become to the new Blue Ranger and help the team on Muranthias, where they used the Turbo Zords to destroy Maligore. An infuriated Divatox swore vengeance on the Rangers, and returned to Angel Grove to terrorize it with detonators and monsters.
The Rangers continue to battle Divatox, with the help of new mentor Dimitria, and new assistant Alpha 6, who arrived after Zordon and Alpha 5 left for home. Tommy, Kat, Tanya, and Adam were relieved of their duties as Power Rangers, so that they could pursue other aspects of life, and they passed on their powers to a new generation of Rangers - TJ, Carlos, Ashley, and Cassie.
The new Rangers found guidance and assistance in a mysterious new ally known as the Phantom Ranger, who literally appeared out of nowhere, with the power to turn invisible, and helped the Rangers fight Divatox's forces. His identity remained secret, and he eventually departed Earth, but not before giving the Rangers powerful new Zords called the Rescue Zords.
Unfortunately, in the end, the Turbo Rangers were unable to stop the Power Chamber's destruction at the hands of Divatox. The now powerless Rangers, excluding Justin, who stayed behind with his father, left Earth in a Space Shuttle in hopes of saving Zordon, who was kidnapped by Dark Specter.