Hard NOx

E1

Volkswagen's "clean diesel" cars seemed like a dream come true for carbon-conscious drivers -- until a fraud of staggering proportions came to light.

Payday

E2

Behind the lavish lifestyle of race car driver Scott Tucker lay a secretive lending empire built on tribal perks and profits from poor customers.

Drug Short

E3

When drugmaker Valeant began to grow at dizzying speeds, investors were thrilled. But a handful of skeptics realized something was very wrong.

Cartel Bank

E4

A trail of suspicious transactions led to startling revelations about banking giant HSBC and its ties to Mexico's deadliest drug cartels.

The Maple Syrup Heist

E5

An unusual heist that made headlines around the world highlights a bitter feud over one of Canada's most precious resources: maple syrup.

The Confidence Man

E6

Donald Trump's image as a savvy businessman dazzled millions. But journalists and former associates describe an empire awash in drama and shady deals.