Phineas and Ferb decide to invent "S'Fall," a colorful world full of giant leaf piles and gourds. Meanwhile, over at . Dr. Doofenshmirtz is mentoring Rodrigo, a budding student of evil. Unfortunately, Rodrigo truly is evil, and when he captures Dr. Doofenshmirtz and Agent P, it's up to Major Monogram's son, Monty, to save the day. I really liked that episode so much and the action of this episode was really great. "S'Fall" song was really great. I was gonna give that episode a 10/10 but in the ending of this episode, Vanessa falls in love with Monty. I think FerbXVanessa fans was dissapointed by this episode. 9.5/10