Don unveils the real-life story behind an impressive work of art. He examines a simple tire cover connected to a bizarre religious cult. And he visits the robot that may have saved thousands of human lives in the worst nuclear disaster in American history.

Don examines a simple cardboard box that's contents were once tied to a deadly outbreak that paralyzed the country with fear. He inspects a small pill bottle that may shed light on an icon's mysterious death. And he investigates a Civil War submarine.