The upcoming prequel to HBO's 'Game of Thrones' will explore the origins of the Targaryen dynasty starting at the time of the family's greatest power, the cast and creators told fans at the annual Comic-Con pop culture convention on Saturday. 'House of the Dragon', which debuts August 21, takes place 200 years before the events of 'Game of Thrones', a medieval fantasy series that became a global phenomenon during an eight-season run that ended in 2019. The new 10-episode series tells the story of a "generational war" among the Targaryens, executive producer Ryan Condal said.

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