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S1:E12 - Captain Underpants and the Sickening Fumes of Smartsy Fartsy

Captain Underpants and the Sickening Fumes of Smartsy Fartsy

S1:E12
2018
10/10
IMDb

To steal Mr. Krupp's rule book from a tightly locked safe, the boys cook up a super-intelligent gas cloud who winds up turning against them.