Phineas and Ferb ... (Isabella Garcia-Shapiro). Co-creators and writers Dan Povenmire (Dr. Heinz Doofenshmirtz) and Jeff "Swampy" Marsh (Major Francis Mongram) are reprising their evil versus ...

Doofenshmirtz is back to his evil ways ... Doofenshmirtz's social media takeover, this Phineas and Ferb trailer stays true to the original show. Phineas, Ferb, Isabella, and their friends are ...