Imagine going from a six-figure senior VP of research and development to receiving anonymous death threats and teaching high school chemistry. This episode traces the dramatic transformation of Dr. Jeffrey Wigand, the corporate insider who sparked one of the most consequential scandals in American history by exposing what Big Tobacco knew.

A biochemist with a career at Pfizer, Johnson and Johnson, and Union Carbide, Wigand joined Brown and Williamson believing he would help build a safer cigarette. Instead he uncovered deliberate chemical manipulation, was fired, and after a three-year silence was compelled to testify, becoming the archetype of the modern whistleblower.

• He discovered the flavoring additive coumarin, a known carcinogen, was being used in the product
• He revealed that ammonia was used to free-base nicotine,  ...