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)
The Space Rangers meet the Teenage Mutant Ninja Turtles.

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)
Former villain Astronema (Melody Perkins), now aligned with the Power Rangers, attempts to divert an asteroid sent by Dark Specter (Christopher Cho) to destroy Earth. After sneaking aboard Dark Specter's spaceship, she is captured and brainwashed into rejoining his evil army.