Watch Phineas and Ferb Season 1 Episode 40 full movie online free in HD with English subtitles – no download needed.
Phineas and Ferb: The boys learn about one of Ferb's Victorian ancestors, who helped a vaguely familiar scientist create a monster. Meanwhile, Doofenshmirtz recalls the story of his great-great-grandfather Dr. Jekyll Doofenshmirtz to Perry, as they both wait out their lockdown.