Lesson 39: Uro-Uro! The Children Don't Return

'''Uro-Uro! The Children Don't Return''' is the thirty-ninth episode of Engine Sentai Go-Onger.

Plot
After getting into a fight with her mother, Natsume runs away and bunks with Jyan with Miki fine with it. The next day, a tired Jyan brings Miki to his room when Natsume starts acting strange, only to find her gone. While searching for her daughter, Miki learns that many other children in the city had mysteriously disappeared without a trace, with horns on their forehead. Jyan and Miki follow some children to find Mere's student, Haku of the Gen Jū Unicorn-Ken style, using his Gengi to control the children. While the other Gekirangers hold Mere off, Geki Red and Miki find the abducted children and Haku himself, who reveals his schemes. Jyan assumes Super Form, only to be overwhelmed by Natsume and the other children under Haku's control. But, by eating her daughter's favorite food, Miki manages to get Natsume to break Haku's hold over her, canceling the Gengi on the others. Without his children army, Haku is defeated by Super Geki Red. But Haku enlarges himself, intending to destroy "the filth".Geki Fire attempts to fight in vain until Miki personally pilots SaiDaiOh to extract her maternal wrath on Haku. With Natsume cheering her on, Miki destroys Haku. The Gekirangers see Miki and Natsume off, with Jyan feeling warm. While this all occurs, Rio confronts Suugu, asking if they met before. But Suugu's silence provokes him to assume Black Lion form to fight him to confirm his thoughts. Though he lost to Suugu, Rio sees without doubt that Suugu is the one he had vowed to surpass, the man with white tiger's Geki: Dan.