Figuring the answers to a murder mystery lie in the old Simmons mansion, so Luther Heggs visits the estate at the witching hour of midnight. Certain he's seen a ghost, Luther writes a story which makes front page news -- and brings on a libel suit from the mansion's owner. When the trial judge orders an investigation -- and no apparition appears -- Luther is branded a fraud. That is, until he and his devoted girlfriend team up to uncover the mystery...

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'.