The 'Game Of Thrones' Final Battle Is Bigger (And More Miserable To Make) Than Helm's Deep

In Entertainment Weekly's on-set report on the final season of Game of Thrones, showrunners David Benioff and Dan Weiss, as well as the cast and crew of the HBO series, revealed what went into the final few episodes of the series. Primarily, what went into the three-month shoot that would become the battle of Winterfell — a brutal, torturous production known internally as "The Long Night."

"What we have asked the production team and crew to do this year truly has never been done in television or in a movie," says co-executive producer Bryan Cogman, adding:

"This final face-off between the Army of the Dead and the army of the living is completely unprecedented and relentless and a mixture of genres even within the battle. There are sequences built within sequences built within sequences. David and Dan [wrote] an amazing puzzle and Miguel came in and took it apart and put it together again. It's been exhausting but I think it will blow everybody away."

Directed by Miguel Sapochnik, who won an Emmy for directing the acclaimed battle-heavy episode, "The Battle of the Bastards," Game of Thrones' final battle will be the longest sustained action sequence in cinematic history. Sapochnik frequently studied the most famous prolonged battle sequence, Lord of the Rings' Helm's Deep, to attempt to avoid giving audiences "battle fatigue."

"One thing I found is the less action — the less fighting — you can have in a sequence, the better," the director said. But Sapochnik gave himself a more arduous task than simply sustaining the action for 40-plus minutes. The director and producers decided to make things harder for themselves by filming the sequence across 11 straight weeks, rather than in truncated sections — something that even big-budget productions like Marvel or Star Wars don't even do:

"We built this massive new part of Winterfell and originally thought, 'We'll film this part here and this part there,' and basically broke it down into so many pieces it would be shot like a Marvel movie, with never any flow or improvisation. Even on Star Wars, they build certain parts of the set and then add huge elements of green screen. And that makes sense. There's an efficiency to that. But I turned to the producers and said, ”I don't want to do 11 weeks of night shoots and no one else does. But if we don't we're going to lose what makes Game of Thrones cool and that is that it feels real.'"

It will be unforgettable all right — or at least, an experience the cast and crew would rather forget. The long nights, freezing temperatures, and harsh conditions resulted in several on-set injuries, including a crew member suffering an asthma attack and a "series regular" actress fainting on set.

"Nothing can prepare you for how physically draining it is," Maisie Williams, who plays Arya Stark, said of her first big battle scene. "It's night after night, and again and again, and it just doesn't stop. You can't get sick, and you have to look out for yourself because there's so much to do that nobody else can do... there are moments you're just broken as a human and just want to cry."

"It was the most unpleasant experience I've had on Thrones," Ser Jorah Mormont actor Iain Glen added. "But...on screen it bleeds through to the reality of the Thrones world."