Phineas and Ferb's Frighteningly Top-Secret Marathon was a marathon of Phineas and Ferb that aired on Toon Disney on Halloween, 2008. The episodes were pretty much all scary/monster/Halloweenish episodes. It aired as the final day of Toon Diseny's Howl & Shriek Movie Week which ended after this with the movie Alvin and the Chipmunks Meet Frankenstein.



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