Plot: The third season begins with Phineas and Ferb building a gigantic biome during a bit of bad weather to help Isabella earn a Fireside Girl patch.

Phineas And Ferb - Season 3 - The Great Indoors (Episode 1)
Episode Aired On:
Friday, March 4 2011
14 years ago
Friday, March 4 2011
14 years ago
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Episode 2