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Karsten meets with his contacts in London to locate the biggest clue yet in the search for the people behind the shooting.
Travis Langley, psychologist and author of Game of Thrones: Psychology, discusses how Game of Thrones affects the mind.
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Krista Gorman recounts her experience in Heaven after she died giving birth.
Uncensored with Michael Ware: Witch Hunt
The Story of God with Morgan Freeman
Obama: The Price of Hope
Sea of Hope: America's Underwater Treasures
Gender Revolution: A Journey with Katie Couric
Watch your favorite National Geographic Channel shows the day after they air.