‘House of the Dragon’ Quietly Changes Aegon’s Most Important Book Storyline

Image via HBO Max Published Aug 11, 2026, 5:53 PM EDT Julio is a Senior Author for Collider. He studied History and International Relations at university, but found his calling in cultural journalism. When he isn't writing, Julio also teaches English at a nearby school. He has lived in São Paulo most of his life, where he covers CCXP and other big events. Having loved movies, music, and TV from an early age, he prides himself in knowing every minute detail about the things he loves. When he is older, he dreams of owning a movie theater in a small countryside town. Sign in to your Collider account Editor's Note: The following contains spoilers for the House of the Dragon Season 3 finale and the book Fire & Blood. Seeing brothers reunite is usually very nice, unless one has recently tried to kill the other. In the third season finale of House of the Dragon, we get just that, as Aegon II (Tom Glynn-Carney) arrives in Harrenhal to confront Aemond (Ewan Mitchell) nearly a whole season after the events of Rook's Rest. Aemond, his spirit broken as he recovers from Alicent's (Olivia Cooke) attempt to poison him, believed Aegon to be dead by his hand, and Aegon, revitalized by finding his dragon Sunfyre (despite their injuries), is more boastful than ever. This reunion, however, is the greatest difference in Aegon's journey between the series and Fire & Blood, and hints at major deviations for other characters' storylines for Season 4 — on both sides of the war. Aegon’s Path in ‘Fire & Blood’ Is Much Different After the Battle of Rook’s Rest It's always necessary to make a few changes when adapting a book into a series, but House of the Dragon has been doing way more than that for a while. Aegon spends most of Season 3 wandering around the Riverlands with Larys Strong (Matthew Needham) after they flee King's Landing, struggling to figure out his next steps. He only decides on a path after reuniting with Sunfyre, and is now determined to retake the Iron Throne and kill anyone who opposes him. Collider Exclusive · Game of Thrones Personality Quiz Which Game of Thrones House Do You Belong To? Stark · Lannister · Targaryen · Baratheon · Tyrell Five great houses. Five completely different answers to the same question: how do you hold power in a world that will take it from you the moment you stop paying attention? Eight questions will determine where your loyalties — and your nature — truly lie. 🐺Stark 🦁Lannister 🐉Targaryen 🦌Baratheon 🌹Tyrell FIND YOUR HOUSE → 01 Someone powerful is acting dishonourably and everyone knows it. What do you do? In Westeros, the answer to this question has ended more than one great house. ACall it out, openly and on the record. If honour means anything, it has to mean something when it's costly. BUse it. Information about someone else's dishonour is leverage — and leverage is power. CAct decisively to correct it — with or without the approval of those around me. DChallenge them directly. Strength settles disputes more honestly than courtroom manoeuvring. ENavigate carefully — build alliances, apply quiet pressure, and create a situation where the right outcome becomes inevitable. NEXT QUESTION → 02 What is the source of your power? Every house endures because of something. What is it for yours? AThe loyalty of people who trust me — earned over generations, not bought with gold. BWealth, intelligence, and the willingness to use both without sentiment. CA legacy so fearsome and a vision so total that opposition becomes unthinkable. DPhysical strength, military force, and the respect that comes from being the kind of person nobody wants to fight. ECharm, connection, and the ability to make powerful people feel that my success is also theirs. NEXT QUESTION → 03 Who do you truly fight for? Strip away the banners and the words. The honest answer tells you everything. AMy family and my people — those who depend on me and have kept faith with me through everything. BMy family — the ones who share my blood, even when they exhaust me, even when they disappoint me. CMy cause — a vision larger than any single person, including me. DMyself, and those few who've proven themselves worth fighting beside. EMy house — its name, its future, the position I intend to leave it in when I'm gone. NEXT QUESTION → 04 How do you deal with your enemies? A house's method reveals its character as clearly as its words ever could. AHonestly — I face them directly, and I give quarter when it's warranted. BThoroughly — I don't leave loose ends, and I don't make the same enemy twice. CDecisively — fire answers questions that diplomacy only delays. DHead-on — I'd rather meet a threat on the battlefield than behind closed doors. EElegantly — I prefer to make former enemies into allies, or at least into people who owe me something. NEXT QUESTION → 05 What kind of ruler do you believe in? Westeros is full of answers to this question. Most of them end badly. AA just one — someone who serves the realm rather than using it, who leads by example rather than fear. BA capable one — someone smart enough to navigate the game, ruthless enough to win it, and realistic about what winning costs. CA transformative one — someone who doesn't just rule what exists but reshapes what's possible. DA strong one — someone whose authority is beyond question because the alternative is obviously worse. EA wise one — someone who understands that the realm is fed by more than armies, and that a full stomach keeps more peace than a sharp sword. NEXT QUESTION → 06 You suffer a devastating loss. How does your house respond? How a house handles defeat tells you more about it than how it handles victory. AWe grieve, properly and together — and then we endure, because endurance is what we do. BWe adapt. We reassess. And we ensure that whoever caused this loss comes to regret it completely. CWe burn hotter. Setbacks don't soften us — they clarify what needs to happen next. DWe hit back. Grief and revenge are the same motion in our house. EWe regroup quietly, rebuild our position, and return when we're ready — on our terms, not theirs. NEXT QUESTION → 07 Which of these truths about Westeros do you most believe? Every house has a philosophy. This is yours. AThe lone wolf dies, but the pack survives. Nothing matters more than the people you protect. BA Lannister always pays their debts — in gold or in kind. Reputation is built on consistency. CI am the blood of the dragon. Some destinies are written before the person who carries them is born. DOurs is the fury. When we move, we move completely — and we don't stop until it's done. EGrowing strong means knowing when to bloom and when to wait. Patience is its own kind of power. NEXT QUESTION → 08 The Iron Throne is within reach. What do you do? The answer reveals not just your ambition — but your character. AClaim it only if the realm needs me to — and rule in a way that makes it worth having. BEnsure someone who owes us sits in it. The power behind the throne is safer than the throne itself. CTake it. It was always meant to be mine — I feel that in my bones and in my blood. DSeize it — with both hands, without hesitation. Opportunity in Westeros does not wait to be asked. EPosition my house to be indispensable to whoever sits there — influence outlasts any single reign. REVEAL MY HOUSE → The Maester Has Spoken Your House Is…Your answers point to the great house whose words, values, and way of surviving in Westeros match your own. Bend the knee — or don't. That's very much up to you. 🐺 House StarkWinter is Coming — and you have always known it. You prepare not out of fear but out of duty, because the people who depend on you deserve someone who takes the long view. You lead with honour even when it costs you, because you understand that a reputation built on integrity is the only one worth having. Your loyalty to family and people runs deep — not as sentiment but as a code that doesn't bend when things get difficult. The North endures because Starks endure — not by being the cleverest players in the game, but by being the kind of people others are willing to follow into the cold. You are that kind of person. The pack survives. The lone wolf dies. You already know which one you are. 🦁 House LannisterYou understand the game — its rules, its exceptions, and exactly when the rules become the exception. You play it without illusions and without apology. You are sharper than most people realise, and you have learned to use that gap to your advantage. A Lannister always pays their debts — and you always keep your word, because your word is an instrument of power, and instruments must be kept in working order. You love your family with a ferocity that sometimes blinds you, and you know it, and you do it anyway. The lion doesn't concern itself with the opinion of sheep. Neither, in the end, do you. 🐉 House TargaryenYou carry a sense of destiny that is difficult to explain and impossible to ignore — the feeling that you are not simply participating in the world but meant to reshape it. You are capable of extraordinary things, and you know it, and that knowledge is both your greatest strength and your most dangerous quality. Fire and blood are not just words to you — they are a philosophy about what change requires and what it costs. The Targaryens at their best were transformative rulers who broke chains and defied the limits of what anyone thought possible. At your best, so are you. The dragon has three heads. You are one of them. 🦌 House BaratheonYou are a force — direct, powerful, and difficult to ignore when you enter a room or a conflict. You do not negotiate with challenges. You meet them. Ours is the fury — and yours is a kind of intensity that commands attention, respect, and occasionally fear from those who underestimate what's behind it. You value strength and straight dealing. You'd rather know where you stand in a fight than navigate a web of courtly whispers. The Baratheons built their house on the back of one of the greatest military victories in Westerosi history — and then struggled with what came after. The lesson of your house is that winning is not the end of the story. Governing is. You are learning that too. 🌹 House TyrellYou understand that power does not always announce itself — that sometimes it arrives with flowers, good wine, and a smile that doesn't quite reach the eyes. Growing strong is your house's motto, and you live it: patiently, strategically, always investing in the relationships and resources that will matter most when it counts. You are charming by choice and calculating by nature — a combination that makes you one of the most effective players in any room you enter. The Tyrells fed King's Landing and shaped its politics without ever sitting on the Iron Throne — and they were arguably more powerful for it. You know that the person who controls the food controls the kingdom. And you always know where the food is. ↻ RETAKE THE QUIZ In Fire & Blood, however, none of that happens. Larys smuggles Aegon out of King's Landing when Rhaenyra (Emma D'Arcy) moves to take the city, but there are no detours at Rook's Rest or wanderings around the Riverlands, much less a stop at Harrenhal. Instead, Aegon goes straight to Dragonstone, from where Rhaenyra was leading the Blacks. Upon arrival, he and Sunfyre defeat Baela (Bethany Antonia) and Moondancer to claim the island. Now, Rhaenyra rules from King's Landing, and Aegon from Dragonstone. Aemond, in turn, stays in Harrenhal with Alys Rivers (Gayle Rankin) all this time, where he and Vhagar eventually meet Daemon (Matt Smith) and Caraxes in an epic battle above the God's Eye. Aegon and Aemond never reunite after Rook's Rest, and, although there are hints of enmity between them, this is never explicitly confirmed, with Aemond even ruling as Prince Regent in his brother's stead. It's said that he once claimed the Conqueror's Crown suited him better than Aegon, but that's about it. Aegon and Aemond's Reunion in Harrenhal Might Hint at Their Fates in Season 4 Image via HBO Thanks to Joffrey's (Jack Gleeson) spoilers in Game of Thrones, many people already know how House of the Dragon will end, but it suffices to say that there is still a lot to take place in Season 4, including the outcome of both Aegon and Aemond's stories in Dragonstone and Harrenhal, respectively. Considering how far away from Fire & Blood the series is, though, it's safe to imagine it won't take the same routes to get there. Aegon even lays it out for Aemond: find Vhagar, go to Tumbleton, then march on King's Landing under his banner. If that's what really happens, it's a major deviation. Only, with Aemond still recovering, it's unclear how long they will remain in Harrenhal, and how long it will take to find Vhagar. This gap might be the key to understanding their fates in Season 4. Aemond needs to be there for his battle with Daemon to happen, and Aegon needs to be in Dragonstone, so they are bound to separate eventually. His plan may be to go to Tumbleton, but the battle is finished, so, seeing how he doesn't take part in the Second Battle of Tumbleton (yes, there are two), this might be what finally makes him head to Dragonstone. Harrenhal Might Once Again Define a Whole Season of ‘House of the Dragon’ On the side of Team Black, Rhaenyra is finally aware of Sunfyre and Aegon's survival and is hellbent on finding him, with another possibility being that she sends Daemon to root him out of there. That might just be the moment when Vhagar returns for dramatic effect, flying to one last battle with Aemond against Daemon, his nemesis. The longer Aegon remains in Harrenhal, the more vulnerable he is, so fleeing to Dragonstone once he is found could be his only move at that moment, as Aemond buys him time to do so. Could Aegon simply remain at Harrenhal rather than go to Dragonstone at all? As huge a deviation as that would be from Fire & Blood, Joffrey never says where Aegon and Rhaenyra's fateful encounter takes place, so the series could change the location to adjust its own story. The haunted castle in the Riverlands has played a key role in the series, defining both Daemon and Aemond's journeys and sending many other characters toward their fates, too. Book fans might be waiting for Aegon to go to Dragonstone sooner rather than later, but anything is possible, as long as it serves the version of the story the series wants to tell. Harrenhal already has a reputation, and being the place where the most important death in the Dance of the Dragons takes place would certainly add to its aura. Not that it needs it, of course.