House of the Dragon season 3's biggest continuity gaffe, explained

House of the Dragon is back with its third season on HBO, and right out of the gate, it’s landed in the spot it loves most: heaps of glowing reviews... plus some good old-fashioned nitpicking over its approach to George R.R. Martin’s original work. The new season’s premiere wraps up a fair bit left hanging from Season 2—there’s action aplenty, not to mention more scheming than you can shake a Valyrian steel sword at. Naturally, the show still can’t quite dodge the long shadow of Martin himself, who’s been very public about his issues with how the adaptation goes off-script compared to Fire & Blood.

When the Show Forgets Its Own History

Here’s where it gets a little odd: the very first new episode gives us a scene that seems to ignore one of the oldest, most famous bits of lore in the entire Game of Thrones universe—how Harrenhal, the infamous ruined castle, met its crispy end. For anyone who’s actually read the books, or even watched the original Thrones series, this bit is as basic as “Winter is Coming.”

The scene in question has Alicent Hightower (Olivia Cooke) trying every trick in the book to convince her son, Aemond Targaryen (Ewan Mitchell), to fly his dragon Vhagar off to Harrenhal, rather than hanging about in King’s Landing. Why? Because Alicent has secretly shaken hands (metaphorically) with Queen Rhaenyra (Emma D’Arcy), promising to get Aemond and his frankly terrifying dragon out of the way, which should make the city a walkover for Rhaenyra and her own dragon squad.

Alicent lays it on thick, calling Aemond “so courageous” and hitting him with all kinds of persuasion—one of which is frankly nonsense. She tells him: 'It is a stronghold, one that has withstood dragonfire once before. At Harrenhal you will be unassailable.'

Apparently, that does the trick, because Aemond is convinced. To anyone who’s half paid attention to canon, though, this is… well, let’s be generous and call it creative history.

Quick Recap: What Actually Happened at Harrenhal

• Harrenhal was built by King Harren the Black as the biggest, blingiest castle in Westeros—huge towers, monstrous walls, the lot.
• It was supposed to be utterly impregnable—against anything or anyone, apart from, as it turned out, a man with a dragon the size of a small mountain.
• Enter Aegon Targaryen, who, about 300 years before Game of Thrones is set, turned up with his dragon, Balerion the Black Dread, and roasted the lot of them—Harren, his sons, and the fancy new fortress—in a single fiery afternoon.
• Ever since, Harrenhal has been a charred, haunted ruin, mostly famous as the place that proved—once and for all—that dragons don’t care how thick your walls are.

This isn’t just some background trivia. In Season 2 of Game of Thrones, Tywin Lannister (Charles Dance, reliably chilly) actually spells the whole thing out to Arya Stark. He says:

'Harren the Black thought this castle would be his legacy... Greatest fortress ever built, the tallest towers, the strongest walls... Look at it now: a blasted ruin. Do you know what happened? Dragons happened... Harrenhal was built to withstand an attack from the land. A million men could have marched on these walls and a million men would have been repelled. But an attack from the air, with dragonfire? Harren and all his sons roasted alive within these walls. Aegon Targaryen changed the rules. That’s why every child alive still