The Biggest 'Game of Thrones' Fan Theory Explained

Even if you're a show-only fan of the Game of Thrones franchise, you've probably heard whispers of Jon Snow's secret parentage.
Known as "R+L=J," the theory speculates that the pouty bastard Jon Snow is not the son of Ned Stark, but his nephew.
Many book readers have deduced, through George R.R. Martin's verbose descriptive text, that Ned's sister Lyanna Stark and Rhaegar Targaryen are Jon Snow's true parents, making him a contender for the fiercely coveted Iron Throne as the first heir i- line for the Targaryen household.