Eduardo uses a business card to uncover California underground secrets. Can Elyse link a shotgun to a bloody gang massacre? And Gwen finds ties between a Society Circus and FDR’s New Deal.

What can a Club Continental business card tell us about California’s prohibition-era underground? Then, did gangs use this shotgun in the Chicago St. Valentine’s Day massacre that shocked the nation (repeat segment)? And why is FDR on the guest list for a High Society Circus during the depths of the Depression (repeat segment)?