Different endings will be shot for the final episode of Game Of Thrones to prevent any leaks.
HBO bosses hope this will help protect fans of the hit TV show from unwanted spoilers.
The network's boss, Casey Bloys, said: "You have to do that on a long show. They're going to shoot multiple versions so that there's no real definitive answer until the end.
"Finales are tough. If you think about Six Feet Under, well, that was a pretty good finale.
"But if you think about Seinfeld, if you think about The Sopranos, if you think about Breaking Bad... Everybody has an opinion about how a show should end."
"The thing that was interesting about The Sopranos was that it did make you think. In a way everybody got their own version of it. I think he was probably shot, but I don't think David Chase has really told anybody what really happened in his mind."
This year's series of Game Of Thrones broke all pirating records.
Episodes from the seventh season were leaked, illegally streamed and downloaded more than a billion times, and even held for ransom.
There is yet no confirmation on whether the successor to the Iron Throne will be decided next year, but various media are reporting the show will start shooting as soon as October.
Meanwhile, there are already several theories circulating online on how the show could wrap up.
With all these different scenarios being prepped by HBO, which do you think are likely to run?