When Cosmo gets picked to host the ultra secret Fairy Convention, he picks the most logical place he can think of - Timmy's bathroom. Unfortunately, he picked it on the same day that Timmy's fairy hunting teacher, Mr. Crocker, is coming over for dinner! / After saving Timmy and Cosmo time and time again, Timmy gives Wanda a day off and wishes her to a spa. Of course, with Wanda away and NOT there to save Cosmo and Timmy, what could happen? How about a roach-laden, Martian-invading end of the world?