Robert L. Manahan

Tommy, Billy, Adam, Rocky, Kat and Tanya are turned back to their teenage forms thanks to the Zeo Crystal. The Command Center is gone but the crystal leads them to the new Power Chamber and all but Billy take on new Zeo powers. (imdb)

Divatox has begun her invasion on Earth and the Power Rangers trade in their Zeo crystal powers for Turbo technology powers to combat this new threat. (imdb)