WARNING: There are spoilers below for the current season of Game of Thrones, so continue at your own peril.
Entertainment Weekly spoke with Kit Harington, the once-and-future Jon Snow, about his recent resurrection at the end of the last episode, and specifically how it changes Jon as a character. Here's what the actor told the magazine:
“At first, I was worried that he’ll wake up and he’s the same, back to normal — then there’s no point in that death. He needs to change. There’s a brilliant line when Melisandre asks: ‘What did you see?’ And he says: ‘Nothing, there was nothing at all.’ That cuts right to our deepest fear, that there’s nothing after death. And that’s the most important line in the whole season for me. Jon’s never been afraid of death, and that’s made him a strong and honorable person. He realizes something about his life now: He has to live it, because that’s all there is. He’s been over the line and there’s nothing there. And that changes him. It literally puts the fear of god into him. He’s seen oblivion and that’s got to change somebody in the most fundamental way there is. He doesn’t want to die ever again. But if he does, he doesn’t want to be brought back.”
As you probably expected, it certainly sounds like Jon's return from the great beyond won't be simple. However, if Harington is telling the truth — hey, remember when he lied for a year about Jon's fate? — this could mean that a popular theory has just been discredited.
The theory is that Jon is a warg like Bran, able to take control of animals and see through their eyes. The idea is that Jon instinctively transferred himself into his direwolf Ghost, when he was betrayed by his Brothers of the Knights Watch in the Season 5 finale.
According to Harington, there was nothing in the afterlife — so he wasn't biding his time, skulking around as Ghost — a fact that's surely going to weigh on the character in the episodes to come.
Something else to think about: If Jon were to die again, it's going to be for good. Jon Snow seems to have no desire to wind up like the consistently resurrected Beric Dondarrion.