In the season finale Geoff and Steve return to Poland where, along with their friend Marcin, they investigate the Pultusk meteorite fall from 1868—one of the largest recorded falls in history. The ground is littered with debris from two world wars, and it seems that only a vintage Polish metal detector may be able to help them hunt in the trash-filled and waterlogged landscape. Later, the guys head to NASA's Dryden facility in California. After a tour of the amazing SOFIA airborne telescope, they discuss with NASA experts how the study of meteorites helped guide the American space program.