Finale Part 1: E-Turtle Sunshine of the Spotless Mind / Part 2: Shreddy or Not.Finale Part 1: E-Turtle Sunshine of the Spotless Mind: With the Shredder back with the Foot Clan, Baron Draxum enables the Turtles to enter Splinter's subconscious memories to search for the means of vanquishing their demonic foe for good. However, upon recovering the secret, they find out that its retrieval from the Twilight Realm comes at the price of fully unleashing the Shredder - although they also gain an unexpected new ally in his daughter, Hamato Karai, who was trapped in the Twilight Realm.
Part 2: Shreddy or Not: With her return from the Twilight Realm, Karai proceeds to teach the Turtles about a mystical technique that would link them to the spirits of their Hamato ancestors, thus giving them the power to defeat their enemy. Before they can learn it, the Shredder, having regained his full consciousness, attacks their hideout. His attack forces the Turtles and April to evacuate while Splinter and Draxum remain behind to stall him.