Season 3, Episode 59 When Worlds Collide

First Aired: September 14, 2012

Phineas and Ferb try to prevent an out-of-control planet from smashing into Danville. Meanwhile, Doofenshmirtz attempts to steal the world's largest ball of twine.

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  • Premiered: August 17, 2007
  • Rating: None
  • User Rating:4.73 out of 5 (1,323 ratings)
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  • Premise: Two stepbrothers come up with new inventions and schemes to stay ahead of their punk sister. Meanwhile, their pet platypus plots to take down Dr. Doofenshmirtz. (more)

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