Donald Trump takes on global warming, Pope Francis criticizes wealth disparity, scientists look for time travelers online, and John Seigenthaler discusses Al Jazeera America.
Where to Watch John Seigenthaler
Cast of John Seigenthaler
Stephen ColbertSelf - Host / Writer / Producer
Ben KarlinWriter
Jon StewartWriter
Meredith BennettProducer
Paul DinelloProducer
Monica HickeyProducer
Steven HoltzmanProducer
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