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Late Show with David Letterman
Season 19, Episode 57
Episode Title: Jason Segel, Zach Wahls, Fun
Air Date: 2012-04-23
Overview:
Dave welcomes Actor Jason Segel from the CBS comedy series 'How I Met Your Mother,' author Zach Wahls, musical guests Fun, and a Top Ten List presented by Chicago White Sox perfect game pitcher Philip Humber.
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