Join or Die with Craig Ferguson

2. History's Worst Medical Advice

Chris Hardwick, comic Jordan Carlos and scientist Bob Pflugfelder discuss history's worst medical advice.

3. History's Biggest Frenemies

Courtney Cox, comedian Dan Soder and author/comedian Michael Ian Black debate and discuss history's biggest frenemies.

4. History's Most Doomed Presidential Campaign

Guests Elijah Wood, comedian Bryan Callen and Professor Dan Schnur discuss history's most doomed presidential campaign.

5. History's Worst Tyrant

Julie Bowen, Dan Levy and Laila Lalami discuss the worst tyrants in history.

6. History's Craziest Cult

Jack Black, Tymberlee Hill and Stephen Prothero talk about crazy cults.

7. History's Greatest Invention Since 1950

Trace Adkins, Kate Flannery and Lori Greiner talk about great inventions of the past half century.

8. History's Most Influential Band

Lars Ulrich, Tom Papa and Alan Light talk about great rock bands,

9. History's Most Influential Drug

David Eisenbach, Maria Bello and Derek Waters talk medicine.

10. History's Biggest Fall from Grace

Jay Leno, Mark Forward and Howard Bragman

11. History's Greatest Man-Made Structure

Adam Goldberg, Noel Wells and Ty Pennington talk great modern mysteries

12. History's Most Plausible Conspiracy Theory

Judd Apatow, Kurt Braunohler and Mike Massimino don tin foil hats.

13. History's Biggest Presidential Bad Boy

Angela Kinsey, Heather McDonald and Joel Stein talk bad boy presidents.

14. History's Dumbest Mistake

Dan Riskin, Ian Abramson and Tim Meadows talk about the dumbest mistakes in history.

15. History's Greatest Unsolved Mystery

Michael Ian Black, Josh Wolf and Jason Biggs channel Robert Stack for a look at famous unsolved mysteries.

16. History's Greatest Gangster

Derrick Pitts, Thomas Dale and Joel McHale talk about the greatest gangsters to ever have lived.

17. History's Greatest Unexplained Phenomenon

Mike Massimino, Megan Amram and Larry King talk about the greatest known unexplained phenomena.

18. History's Most Defiant Moments of the Last 75 Years

John Avlon, Yvette Nicole Brown and Lisa Kudrow talk about big mmoments where people still revolt.

19. History's Best Founding Father

Joel Stein, Jo Koy and Fred Willard discuss the founding fathers.

20. History's Biggest Fraud

Joel Stein, Russell Peters and Michael Sheen talk about history's frauds.

21. History's Biggest Badass

Evy Poumpouras, Mark Forward and Regis Philbin talk about the badasses of history.