Nothing Is Random.

"There are moments which mark your life. Moments when you realize that nothing will ever be the same. And time is divided into two parts: 'Before this,' and 'after this'. Sometimes you can feel such a moment coming. That's the test, or so I tell myself. I tell myself that at times like that, strong people keep moving forward anyway, no matter what they're going to find." - John Hobbes ("Fallen," 1998)

"Game of Thrones", "Fallen", "Saving Grace", and "American Gods" are all apart of Eric Kripke's "Supernatural" universe in my opinion. There's way more franchises that I could add on to that list (and have in the past) but we'd be here all day if I incorporated them this time.

Anyway, while Kripke admits the strong influence of Neil Gaiman's "American Gods" on his masterpiece, the rest of the above mentioned franchises fit perfectly into Kripke's tale too. "Fallen" details the story of a detective in the late 90s who finds his life turned upside down when a demon named Azazel - the same demon who killed Sam and Dean Winchester's mother in the early 80s on "Supernatural" - drags the detective into an underground paranormal war that is fought on humanity's part by people who are described in the film as "chosen individuals" the way Hunters do on "Supernatural"; "Game of Thrones" is set in a medieval setting where the mystical forces of the world have gone dormant for thousands of years and where demonic forces like those birthed from Melisandre predominantly travel in black smoke the same way that they do in Kripke's "Supernatural"; "Saving Grace" detailed the life of Oklahoman detective Grace Hanadarko and the time she spent reforming her wild past with the help of a guardian angel named Earl who spoke of a certain amount of humans living in the present who had been chosen for a higher purpose the same way that Castiel explained to Dean in season four's "There's a Monster at the End of this Book" that the chosen prophets of today have been charged, unbeknownst to them, with the duty of writing a "New" New Testament who's biblical heroes are modern people like The Winchesters and others like Grace Hanadarko who've had an interest taken in them by Heaven. 

"Game of Thrones" and "Fallen" both act as prequels while "Saving Grace" takes place simultaneously with the second through fifth seasons of "Supernatural". Some people don't like the idea of crossing franchises over with each other but it's logical connections like the ones I make in my mind like such that intrigue me like none other. Some of you know how much I love the idea that most of my favorite stories take place in the same continuity so I'm sure I'll be doing another one of these for you guys soon enough.