Mary Roach
Egypt suffers democratic growing pains, John Oliver investigates violence against guns, and Mary Roach demystifies the digestive process.
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More from this season
S18 E1
Arnold Schwarzenegger
The Obama and Romney camps aim low at the debates, the White House responds to violence in Libya, and Arnold Schwarzenegger discusses time travel and his book, "Total Recall".
S18 E2
Liam Neeson
A Pennsylvania judge rules against the state's voter ID law, John Oliver asks Herman Cain to save America from foreign debt, and Liam Neeson talks kicking ass in "Taken 2".
S18 E3
Rand Paul
An explosive Obama video resurfaces, Stephen Colbert plays the part of Bill O'Reilly, and Rand Paul shares libertarian anecdotes from his book, "Government Bullies".
S18 E4
Bill O'Reilly
Mitt Romney's lies win the first debate, Barack Obama breaks Chris Matthews, Al Gore ponders elevation sickness, and Bill O'Reilly discusses "Killing Kennedy".