There's no doubt as to which scene provided the biggest reveal during the "Game of Thrones" season six finale.
After last Sunday's show, we know for certain Jon Snow is not Ned Stark's bastard, rather he is the son of Lyanna Stark and Prince Rhaegar Targaryen.
But there's one question for which the answer is still, technically, unclear. Why didn't Ned Stark tell his wife, Catelyn Stark, this whole time? Simple logic would lead one to believe Ned Stark was committed to keeping a secret, and the most stubborn of commitments mandates he not tell anyone.
Still, a little "Game of Thrones" history lesson shows how Ned's relationship with Lady Catelyn conditioned the amount, or lack, of trust he had with her.
As Catelyn mentions on numerous occasions in the show -- and, for what it's worth, in a recounting of the history of Robert's Rebellion in the video below -- she and Ned barely knew each other when they married.
Catelyn Tully was initially betrothed to Brandon Stark, Ned's older brother. But after Brandon and Rickard Stark, Ned's father, were killed by the Mad King Aerys Targaryen, a marriage was arranged between Catelyn and Ned to preserve the alliance of House Tully and House Stark.
Those are just some of the details that informed one fan's theory that asserts the real reason Ned never told Catelyn who Jon Snow's real parents are.
There are two important tenants of this mini-theory of sorts.
First, it was an open secret Ned Stark was infatuated with Ashara Dayne, sister of Ser Arthur Dayne, whom Ned and Sir Howland Reed killed at the Tower of Joy where Lyanna had been giving birth.
Second, because Ned was in love with another woman and did not have much of a relationship with Catelyn before, he decided to keep the secret from his wife to ensure that word did not get out.
In addition, in the season six finale, Lyanna Stark mentioned she feared for Jon's safety particularly because of what King Robert Baratheon might do to him.
That's because Robert murdered Prince Rhaegar Targaryen's children during the rebellion. And despite the fact Jon Snow is Rhaegar's bastard, he would still have a claim to the throne like Prince Rhaegar's legitimate children.
So, why exactly did Ned Stark not tell anyone about Jon Snow, especially his wife?
Well, the stakes were just too high to let the word out.