Power Rangers in Space

Power Rangers in Space is a 1998-1999 American television series that aired on the FOX television network (as part of the Saturday morning FOX Kids lineup). It is the fourth incarnation of the Power Rangers franchise, and is (somewhat loosely) based on the Super Sentai series Denji Sentai Megaranger (Electromagnetic Squadron Megaranger). The series picks up from where the previous series (Power Rangers Turbo) left off, with the Rangers escaping into space to seek out their old mentor, Zordon.

Shell Shocked (Season 1, Episode 4)
In order to destroy the Space Rangers, Astronema uses her powers to brainwash another similar team of teen heroes, the Teenage Mutant Ninja Turtles. With them under her power, the Turtles con the Rangers into letting them on the Astro Megaship, so they can take it over for her.

All goes according to plan, until the Rangers escape and the Megaship hits an electric storm. The shock causes the Turtles to break free of Astronema's spell and expel her from the ship. The Rangers return to assist, and plan to return the Turtles back to New York. However, they have one tiny little request - Galaxy Gliding in space!

SInvasion of the Body Switcher (Season 1, Episode 19)
Capturing Ashley on her birthday, Astronema uses the Body Switcher's special powers to take on the form of the Yellow Ranger. She infiltrates the Astro Megaship and captures each of the Power Rangers, except for Andros. Ashley tricks the monster and Elgar after transforming into Astronema, which aids in her escape so she can save her friends before it's too late.

Dark Specter's Revenge (Season 1, Episodes 29-30)
Dark Specter wants Astronema back, and to accomplish this, he sends an asteroid on a collision course with Earth. Astronema sneaks aboard the Dark Fortress to divert the asteroid's course, but she is captured and reverted to being evil, while a returning Zhane assists the Power Rangers in destroying the asteroid with a new Zord.