Two floors beneath Antwerp's diamond district sat a vault straight out of a billionaire's security fantasy: infrared heat detectors, seismic sensors, Doppler radar, a magnetic field on the door, and a private security force above. Over the weekend of February 15th, 2003, a crew of thieves walked out of it with more than $100 million in diamonds, gold, and jewelry, defeating the technology with hairspray, a piece of styrofoam, and patience.

This episode unpacks the greatest heist of the century as a master class in the illusion of security. Leonardo Notarbartolo didn't break in; he moved in, renting an office in the Diamond Center for two years until the guards stopped seeing a threat and started seeing the nice guy from the third floor. With a camera hidden in a fire extinguisher and a crew of specialists called the School of Turin, he beat the unbeatable, and most of the haul has never been found.

• The two-year long con: how a paying tenant became a walking Trojan horse inside the Diamond Center
• The Monster, the Genius, Speedy, and the King of Keys: why elite crews are built from hyper-specialists
• Hairspray on the heat sensor, styrofoam against the radar: the analog tricks that blinded a digital fortress
• The salami sandwich in the woods: how a fit of littering unraveled a hundred-million-dollar crime
• Ten years for the mastermind, five for the crew, and the anonymous diamonds still circulating on fingers worldwide