The 'Knight of the Seven Kingdoms' finale just blew up Dunk and Egg's biggest secrets

Peter Claffey as Dunk in "A Knight of the Seven Kingdoms."

Steffan Hill/HBO

• The season one finale of "A Knight of the Seven Kingdoms" aired on Sunday.
• The episode features key scenes that don't exist in George R. R. Martin's book, "The Hedge Knight."
• Showrunner Ira Parker told Business Insider that he was careful not to contradict the original text.

Spoilers ahead for "A Knight of the Seven Kingdoms" season one, episode six, "The Morrow," and the book "The...