Power Rangers Zeo: Revisited

Master Vile attempted to use the Orb of Doom to reverse the rotation of Earth and turn back time, which would have reverted the Rangers into powerless children, but a mysterious field destroyed the Orb before it could be completed. While the Alien Rangers defended the Earth in the meantime, the Rangers went to a different point in time to retrieve the Zeo Crystal (a crystal intended for the future king of Edenoi, Alpha 5), which was shattered and scattered throughout time by the Rangers themselves. Upon their return, the Zeo Crystal was empowered with vast quantities of energy, and its power was used to kill Master Vile.

Their victory did not last long. Rito and Goldar infiltrated the Command Center and stole the Crystal, just before the explosive device they had planted earlier went off, leaving the Command Center in ruins, and the Rangers without a headquarters. While searching through the wreckage, the Rangers found the Zeo Crystal, apparently dropped by the two villains, and then fell into the underground Power Chamber, their new base of operations, where Zordon and Prince Alpha retreated to during the explosion.

While celebrating the defeat of the Power Rangers, Zedd's palace is attacked by the Machine Empire, who wants to take over the Earth as well, causing Zedd, Rita, and the rest to evacuate and head for the M-51 galaxy. With the prince using the power of the Zeo Crystal, Tommy, Kim, Rocky, Tanya and Adam became the Zeo Rangers, Earth's only hope against the Machine Empire.

Mondo's plan to divide and conquer was working, and for the Rangers to succeed, they needed help from the Gold Ranger, Trey, who travels to planets where evil needs to be defeated. With the Golden Power in danger of being lost, they were given to former Blue Ranger Billy, who joined the team as the sixth Zeo Ranger until it was time to return the powers to Trey. Shortly after Trey reclaimed his powers, Rita and Zedd returned and almost blew up the Machine Empire's leaders.