Episode Title:Unchain My Heart, Part 4.Episode Description:Bonesteel negotiates a deal with Vam-Mi & Co. to work together to defeat the Turtles. While the Turtles work on various gadgets with which to locate and fight Vam-Mi, Venus continues to practice Shinobi magic spells to defeat Vam-Mi. She is unsuccessful at first, but is able to finally master the Shinobi spell from her ancient scrolls. The Turtles track down Vam-Mi who proves to be more powerful than they had imagined. Bonesteel takes advantage of the fight and ends up capturing Leonardo, Michaelangelo, Donatello, and Raphael, while Splinter and Venus flee. The Turtles trick Bonesteel and escape back to the lair, where Venus uses her telepathy to commune with the heart. Vam-Mi uses magic to teleport to her heart, and the Turtles ambush her with sunlight. Vam-Mi dissolves into ash and she is finally defeated. Venus reflects on her experiences and realizes that she is now part of the Turtles' family and is a true Shinobi warrior.