Dr. Doofenshmirtz appears in both episodes of the spin-off The OWCA Files in which he’s partnered with Perry the Platypus and had to fight another evil scientist named Parenthesis. In the spin-off Milo Murphy’s Law, he invents time travel and changes his name to Professor Time. Doof also appears in the movie Phineas and Ferb: Candace Against the Universe where he helps fight the aliens and save Earth.