Dr. Robert Kehoe, chief medical consultant of the Ethyl Corporation, defended the safety of leaded gasoline and protected the industry from uncomfortable questions about its dangers. He influenced studies funded by industry and carried out by himself. The podcast explores the invention of leaded gasoline, health hazards, temporary bans, investigations into its effects, and the reintroduction of Tetra Ethel lead in gasoline, addressing lead poisoning and spread of misinformation.