Martin revealed to the showrunners ofGame of Thrones.
Showrunners David Benioff and Dan Weiss tell EW those conversations included “three holy sh moments” in particular.
The first: Stannis Barathon sacrificing his daughter Shireen which was shown during the show’s fifth season.

Credit: HBO
The second: Hodor’s mind-bending origin story, which was revealed in Sunday’s hour.
And the third shocking moment?
“… is from the very end…,” Benioff teased.
“So much of what we’re doing diverges from the books at this point.
People are going to be very surprised when they read the books after the show.
They’re quite divergent in so many respects for the remainder of the show.”