'Game of Thrones' episode 5 script details leaked in latest hacker dump

It's been a tough season to stay an unsullied fan of Game of Thrones, as the internet is dark and full of spoilers. And things may just have gotten worse.

Hackers who breached HBO's data late last month released a series of documents Monday, THR reported, this time a company executive's email that includes a detailed script summary from next week's Game of Thrones episode.

The summary is just one item from a month's worth of emails from mid-April to mid-May that were put on a publicly accessible website, THR said. The trade publication did not share the link -- which so far we've been unable to find ourselves -- nor did it divulge much from its contents, other than to say it was from a New York-based programming VP.

The hackers forwarded the materials, including nine files and a "video letter" it purportedly sent to HBO brass, directly to THR. "We successfully breached into your huge network," the message reportedly said, adding: "HBO was one of our difficult targets to deal with but we succeeded (it took about 6 months)."

There's nothing yet to suggest that the hackers have compromised HBO's email servers on a scale that created a media feeding frenzy in late 2014 with the hack of Sony Pictures. Though THR says it is protecting HBO's assets (for now), it was one of dozens of media outlets, including this one, that mined Sony's private company emails for stories for months on end.

Other Game of Thrones-related materials in this dump: castings, marketing materials, and media plans. There's no indication yet that the hackers have full episode files, like the one that leaked last week overseas (and we strongly encouraged you not to watch).

The hackers are demanding an undisclosed sum from HBO, THR said, and told the network that they're just one of three out of 17 companies that have so far refused to pay a ransom. HBO says it anticipated the leak and is still working on its investigation with the help of outside cybersecurity firms and law enforcement.

Is this just the tip of a wintry iceberg? Do these hackers have a plan to roll out more of the massive 1.5 terabytes of information they claim to have swiped? We'll see how much Game of Thrones leakage HBO can stand before changing course, but for now the company seems content to weather the storm.

Update, 8/8, 10:30 am ET: The Guardian reports that the data dump also includes confidential email addresses and other personal information of Game of Thrones cast members such as Emilia Clarke and Peter Dinklage, although Mashable did not independently confirm that. Reps for the stars did not immediately respond to Mashable's request for comment.