History's Greatest Unsolved Mystery 1 Season 15 Episode

Episode #1

History's Biggest Political Blunder

Episode #2

History's Worst Medical Advice

Episode #3

History's Biggest Frenemies

Episode #4

History's Most Doomed Presidential Campaign

Episode #5

History's Worst Tyrant

Episode #6

History's Craziest Cult

Episode #7

History's Greatest Invention Since 1950

Episode #8

History's Most Influential Band

Episode #9

History's Most Influential Drug

Episode #10

History's Biggest Fall from Grace

Episode #11

History's Greatest Man-Made Structure

Episode #12

History's Most Plausible Conspiracy Theory

Episode #13

History's Biggest Presidential Bad Boy

Episode #14

History's Dumbest Mistake

Episode #15

History's Greatest Unsolved Mystery

Episode #16

History's Greatest Gangster

Episode #17

History's Greatest Unexplained Phenomenon

Episode #18

History's Most Defiant Moments of the Last 75 Years

Episode #19

History's Best Founding Father

Episode #20

History's Biggest Fraud

Episode #21

History's Biggest Badass