In the movie Phineas and Ferb: Across the Second Dimension, he goes to a parallel universe where a more evil version of himself already won and Doof ends up stopping the other him from taking over the Tri-State Area from the main universe. In the Season 4, episode Mission Marvel, he accidentally steals the powers of the superheroes from Marvel Comics and teams up with the Marvel supervillains but the villains betray him so he helps stop them. In the Season 4 episode Minor Monogram, his sidekick betrays him and tries to take over the world so Doof helps stop him. In the Season Four episode, “Primal Perry” he hires a hunter from Australia named Liam to trap Perry the Platypus. He ends up working with Perry to stop him after Liam tries to kill them both. In the episode Doof 101, it’s revealed that after summer ended he was given a choice between jail and community service and ended up as a high school science teacher. The episode Act Your Age, set in the future, reveals that he didn’t commit any crimes since then. In the episode Phineas and Ferb save Summer, he helps the good guys stop a mad scientist named Rodney from putting the world in a new ice age but says he’s still evil. In the horror episode Night of the Living Pharmacists, he accidentally starts a zombie pharmacist apocalypse and helps to stop it. In the series finale Last Day of Summer, he builds a machine called the Do-Over Inator so that he can start the same day over any number of times and accidentally nearly destroys the universe so he tries to save it from himself and his daughter Vanessa convinces him to turn good.