Tess Makes the Man - S1.E12

Tess gets an acting job as guest star as the science teacher, Miss Witherspoon on the sit-com Growin' Up, which according to P.J. is ""a whimsical view of growing up as seen through the eyes of twelve year old Jeffery Up."" P.J. agrees to take over the superintendent duties for the week while she films. Timmy, the actor who plays Jeffery, says he will make Tess a co-star if she sleeps with him. Meanwhile, Johnny is suffering from impotence and asks Iowa for help. Of note is the ""stamp test"" used to determine if it is of physical or mental causes.