The August 6 episode of Game of Thrones leaked last week before its air date, though some sources said the release of the episode was not linked to the hackers. The Reporter wrote the documents included a video letter addressed to HBO CEO Richard Plepler, who was not the executive whose emails were leaked.“We successfully breached into your huge network,” the video said. While it has been reported that a number of emails have been made public, the review to date has not given us a reason to believe that our email system as a whole has been compromised.”.