[Warning: This article contains spoilers from the Game of Thrones episode "The Door." Read at your own risk!]

Do you hear that? That's the sound of every Game of Thrones' fan's heart breaking — and there's only Bran (Isaac Hempstead-Wright) to blame.

Tired of waiting for the Three-Eyed Raven (Max von Sydow) to dole out the next important piece of information, Bran got cocky and decided to take his first vision quest alone on Sunday's episode. But rather than returning to Winterfell or the Tower of Joy, Bran found himself surrounded by the White Walkers' army without any of his usual magical protection. The Night's King not only was able to see Bran, but managed to grab his arm and turn him into a GPS beacon for White Walkers.

So what was it like to face off with the Night's King and live to tell the tale?

"Terrifying. Absolutely terrifying," Hempstead-Wright tells TVGuide.com. "The makeup on the Night's King is kind of unreal. He has these extraordinary contact lenses and prosthetics which take something ridiculous like eight hours to get into. So standing there with him and interacting with him in that scene was pretty intense in that vast, snowy landscape, but it was amazing to film. And the guy who plays the Night's King, [Vladimir Furdkik], is just a really, really cool guy, so we just hung out and had a laugh."

Isaac Hempstead-Wright and Vladimir Furdkik, <em>Game of Thrones</em>Isaac Hempstead-Wright and Vladimir Furdkik, Game of Thrones

Unfortunately, this fun experience for Hempstead-Wright lead to one of the show's more tragic scenes. Once Bran was marked, the Three-Eyed Raven's cave lost its magical protection against the White Walkers, who immediately stormed the hideout. Bran and Meera (Ellie Kendrick) managed to make it out alive, but poor Hodor (Kristian Nairn) sacrificed himself to save his friends.

But, as the episode revealed, the White Walkers aren't necessarily villains. The Children of the Forest initially created them to act as protection against humans who were destroying their homes. That means it's possible the White Walkers aren't driven by any nefarious intentions, but are merely attempting to protect their own society and land from trespassing humans.

Game of Thrones: The Night's King's return delivers a heartbreaking death

"That's a cool idea, that perhaps they're just this completely misunderstood race that has been shrouded in myth and lies over time," Hempstead-Wright muses. "That's a really interesting theory. I like that. Although, they did look pretty mean at Hardhome. I don't think they were good guys there."

Even if the White Walkers are revealed to be no worse than humans, it's unlikely Bran will ever see them as such since they took away his most trusted travel companion. After spending a good chunk of the past six seasons being carried around on Hodor's back, Hempstead-Wright sums up the experience in one word: "Beautiful."

"I always comment on how lovely Kristian's hair smells. He's exquisitely perfumed," he explains.

At least we can say Hodor died as he lived: Being the best and smelling great.

What did you think of "The Door"?