The Simpsons Season 2 Episode 19

Lisa's teacher, Miss Hoover, is stricken with Lyme disease, and Mr. Bergstrom, a cool, witty, substitute teacher takes her place. Lisa is smitten with the smart, sensitive man, who contrasts so favorable; it seems, with her own father. Meanwhile, Bart decides to run for class president where he is expected to easily triumph over class brain Martin Prince.