Ep 2. Samurai Ratso

After defeating Drago in the conclusion of season 3, Jackie and his family are enjoying a day out in the park. However, they are soon interrupted by the arrival of Viper, who informs them of a new Emperor who is causing trouble in the Netherworld. Meanwhile, Ratso becomes possessed by the spirit of a legendary samurai warrior named Ikazuki, who grants him incredible combat skills.

The new Emperor, who is revealed to be Hak Foo, has taken control of the Netherworld by using the power of three magical swords. In order to defeat him, Jackie and his team must retrieve the swords. However, they soon find themselves up against Hak Foo's generals - a trio of samurai cats commanded by Ikazuki.

As they search for the swords, Jackie discovers that Ratso has been possessed by Ikazuki's spirit. With his new abilities, Ratso becomes a formidable opponent for our heroes, and they must find a way to save him before it's too late. To complicate matters further, Viper soon finds herself under the control of the evil Emperor, and Jackie must also find a way to break her free from his spell.

With action-packed fight scenes, hilarious antics from Jackie's uncle and a heartwarming storyline that explores the power of family and friendship, Samurai Ratso is a thrilling addition to the Jackie Chan Adventures series that will keep viewers on the edge of their seats from start to finish.