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Guess how many viewers tuned into the 'Game of Thrones' season 8 premiere?

'Game of Thrones' fans are thrilled that the series is back in action with a brand new season, but the most remarkable thing about the series is how its viewership grows with each season. Last night's season 8 premiere ranked in with one billion views. Yahoo Finance's Adam Shapiro and Julie Hyman discuss with the panel.