You can now watch the entire Phineas and Ferb Season 3 Episode 20 movie online in high-definition quality, complete with English subtitles for a better viewing experience. Best of all, there’s no need to download anything—simply stream it directly from your device anytime, anywhere.
Phineas and Ferb find themselves in the Stone Age as cavemen and try to invent the wheel; the guys visit ancient China, where they try to rescue a princess who was taken prisoner by Doofus Khan.