The Rivals: Barney's attempts to teach Opie the ways of women backfires when Opie uses his new knowledge to swoon Thelma Lou. Opie and the spoiled kid: When Opie becomes friends with the new scheming "rich kid", he decides that his own allowance should be tripled. Andy discovers America: Opie puts Andy's knowledge of history to the test when his attractive new teacher comes a callin'.