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Candace searches for her brothers' crazy inventions, which always disappear without a trace; the boys open a platypus-themed restaurant in their front yard, but the doorman refuses to let Candace enter; Doofenshmirtz goes on a blind date.
The third season begins with Phineas and Ferb building a gigantic biodome during a bit of bad weather to help Isabella earn a Fireside Girl patch. Later, the guys create a robot dog and Candace meets Jeremy's mom (Jane Lynch).
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You'll never guess who Geena Davis was into in college