"Quailman Vs. the Quizzler" is the forty-ninth episode of Doug.
Everyone at Beebe Bluff Middle School is worried about the upcoming mysterious S.P.I.T. tests. If they fail, they could be sent back a grade...or so the rumor says. Then, Doug bumps into Mr. Bone, who leaves behind the S.P.I.T. test folder. If Doug takes a look inside the folder, he can tell his friends what's on the test. Doug wonders if that's the right thing to do, then turns to Quailman. In Megalopolis, the Quizzler is stealing information and words and alphabets all over town and Quailman wants to stop and confront him. Quailman must set everything back to normal.