The Simpsons S15 E14 The Ziff Who Came to Dinner

"Just a product of society that's lost its good manners."

The Simpsons go on a late-night attic search after Bart and Lisa (who are freaked out over a horror movie Homer let them watch) begin hearing voices -- and find Marge's ex-prom date Artie Ziff, who's on the run for cheating the shareholders of his company.