As infamous as Oberyn Martell became when he appeared in the fourth season of Game of Thrones, a lot of his dark, bloodthirsty back story was kept hidden on the show.
For every great Targaryen king, there was a brutal one, and one of the worst was Aegon the Unworthy. His cruelty and lust were boundless, and his final act tore Westeros apart.
Many fans were stunned when Daenerys Targaryen took a violent and dark turn in the final season of Game of Thrones—but most don’t realize that the ominous signs for this shift were there all along.