_CAPSULE SUMMARY:_
Prince Gasket & his wife Archerina, both still the object of ire from Gasket's father, sneak off when King Mondo returns, vowing to return one day and reclaim their control of the Machine Empire.
As for the Zeo Rangers, they've got big trouble from within. Remember back in "Climb Every Fountain", when Billy used the six Ninja Coins to restore himself to his normal age, during the time-reversal spell on Earth? Well, looks like old brainiac made a boo-boo in it's design, since now, Billy's gone and turned into a wrinkled & greying old man! Once the Earth was restored to the proper time, Billy's fudging of his own age during the spell has seriously screwed up his cell structure. As the day goes on, he continues having episodes where he'll age another decade or two without warning.
Figuring the only way to reverse what's happening to Billy is to rebuild the regenerator that caused the problem in the first place, Cestro & Delphine arrive from Aquitar with a new regenerator, in bazooka form. It seems to be working on restoring Billy to his true age, but it overloads, needing a fresh water reload. Jason goes off and gets said water, which keeps him out of most of the ep's action, of course. Cestro tries again with the regenerator, but it fails to undo the raving of Billy's body, the effects of which are beginning to acclerate.
At the parked winnebago hideout on the moon, Rita gets impatient and decides to try once again to turn her old pal Katherine into a monster. Finster bumps her while she's firing off a bolt from her wand, and instead, Kat's ugly pink purse she made in art class, turns into the Impursonator. This creature, when grown, absorbs just about every shot and attack used against it by the Zeo's Zords, and even returns the energy back at them! Not to be outdone, King Mondo sends the Cog Changer monster down, and before Impursonator can destroy the Rangers, he teleports the creature off to another galaxy. Cog Changer doesn't get a chance to really do much at first, though he fires a small cog which overrides any machine it's attached to. They're used to make the Rangers crash their Zeo Jet Cycles, super-power some Cogs, and without our heroes' knowledge, is snuck into the Zeo Megazord. Later, a disturbance is picked up in the Zeozord Holding Bay, prompting Billy to go in and fix what he thinks is a mere loose wire. Once he's inside the sub-cockpit of said Megazord, Cog Changer's cog activates, sending the Zeo Megazord flying skyward, taking Billy with it and taking out much of the Holding Bay!