'House of the Dragon' just made a major change not in the book. It could make the Targaryen family tree even more complicated.

• Hugh Hammer claims to be related to some popular Targaryens in the latest "House of the Dragon" episode.
• In "Fire and Blood," he is also a bastard, but his parents are never revealed.
• Here's how this could change the storyline for future seasons of "House of the Dragon."

Warning: Spoilers ahead for "House of the Dragon" season two, episode seven, and the "Fire and Blood" novel.