S5·E34 No Substitute for Crazy
Aired November 25, 2006
Synopsis
Crocker has fallen into a well and so Timmy's class has been assigned a substitute teacher called Mrs. Sunshine and she seems very-very nice until Timmy wishes for her to be his permanent teacher, she turns out to be even worse than Mr. Crocker when she is really an expert fairy hunter named Mrs. Doombringer.