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)
Astronema use his scepter to hypnotize the TMNT.

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.