"But the whole thing for me was about dead Joffrey lying there, watching the whole thing," Graves revealed. "(Showrunners) David (Benioff) and Dan (Weiss) loved that, and I was like, I wanted to make sure I had Jack in there as much as I could."

So why was it so important to have Joffey's recently poisoned body just inches away from this dirty deed? "He is their first born. He is their sin. He is their lust, and their love—their everything. If he's gone, what's going to happen?" Graves continued, "Jaime is still trying to believe as hard as he possibly can that he's in love with Cersei. He can't admit that he is traumatized by his family and he's been forced his whole life to be something he doesn't want to be. What he is—but has to deny—is he is actually the good knight, like Brienne."

Despite the darkness of the scene, Heady and Coster-Waldau continuously erupted in a fit of giggles every time Graves would give a directorial correction. Graves revealed, "I wanted to make sure I had Jack in there as much as I could. Of course Lena and Nickolaj laughed every time I would say, "You grab her by the hair, and Jack is right there," or "You come around this way, and Jack is right there."

And we can never unsee that godawful scene. Mission...accomplished?

Game of Thrones airs Sundays at 9 p.m. on HBO.