Phineas and Ferb · S01E40
The Monster of Phineas-n-Ferbenstein
2008-10-17 · 11 min · 4.5 (2) · TMDB
The boys learn about one of Ferb's Victorian ancestors, who helped a scientist create a monster. Meanwhile, Doofenshmirtz recalls the story of his great-great-grandfather Dr. Jekyll Doofenshmirtz.