Welcome Back, Polarisoids

Krang sends the Polarisoids an invitation to visit Earth, only the Polarisoids think that the ""invite"" is from the Turtles. It seems that Krang wants to get a hold of the Polarisoids' camera -- the one that literally captures its subjects within the camera. Krang has retained one of the Polarisoids ""home movies"" and adapted it so that when it is played in the Polarisoids' camera, it will unleash all the terrorizing aliens that the Polarisoids have ""videotaped"" on their vacations across the galaxies. Krang believes that these vicious aliens will keep the Turtles busy so that he can take control of The City.
When the Polarisoids locate the surprised Turtles, they have no choice but to invite them back to their lair. On the way, Shredder arrives and steals the Polarisoids camera. He inserts Krang's ""tampered"" tape and unleashes an alien monster which, true to form, attacks the Turtles.
Shredder, Rocksteady and Bebop cause havoc throughout The City when they unleash more and more alien mon

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S05E20 - Michelangelo, the Sacred Turtle