If you’ve not read the entire A Song of Ice and Fire series, turn back now.
A popular theory among ‘book readers’ is that Jon Snow is not Ned’s bastard child, but the son of Lyanna Stark and Rhaegar Targaryen. There’s plenty of supporting evidence for this, and heavy implications for the story going forward if this is true. Keeping track of it all can be a bit confusing, but thankfully Alt Shift X has made this informative video to help you keep it all straight. There’s even an appearance by Biggie Smalls. Baby, bay-bay!