'House of the Dragons' most devastating deaths ranked ahead of Season 3

Spoiler warning: This article contains major spoilers for House of the Dragon through the Season 3 premiere.

House of the Dragon, the Game of Thrones prequel series following the Targaryen civil war, has delivered some of the most emotionally wrenching deaths on television across its three seasons — and the Season 3 premiere has already claimed one of the most beloved characters yet.

From infants beheaded in their cribs to dragonriders consumed by fire, the show has never shied away from the human cost of its dynastic conflict. As Princess Rhaenys Targaryen, played by Eve Best, puts it: "There is no war so hateful to the gods as a war between kin, and no war so bloody as a war between dragons."

11. King Viserys Targaryen

Paddy Considine's portrayal of King Viserys the Peaceful earned widespread affection, but his death ranked lowest on the tragedy scale for one simple reason — it was expected. His passing was always going to be the event that set the Dance of the Dragons in motion, and a prolonged, leprosy-like illness had preceded it for so long that his death read more as a release from suffering than a shock.

10. Lady Rhea Royce

Audiences barely had time to form a connection with Lady Rhea Royce, played by Rachel Redford, before she was killed — and killed by her own estranged husband, Prince Daemon Targaryen, played by Matt Smith, no less. Daemon had referred to Rhea as the "Bronze Bitch" and refused to consummate their marriage, leaving little room to mourn what was never developed, though watching Daemon sacrifice a real person for personal gain made for grim viewing.

9. Lyonel and Harwin Strong

Ser Harwin Strong, played by Ryan Corr, and his father Lord Lyonel Strong, played by Gavin Spokes, had limited screen time before their deaths — but the manner of those deaths made them land hard. After Ser Criston Cole, played by Fabien Frankel, publicly insinuated that Harwin had fathered all three of Rhaenyra's children, Lyonel sought to resign as Hand of the King, citing the dishonour brought on the family.

King Viserys refused but allowed him to escort Harwin home to Harrenhal, where both men died in a suspicious fire widely believed to have been orchestrated by their own kinsman, Larys Strong, played by Matthew Needham.

8. The Cargyll twins

Few deaths in House of the Dragon carried more tragic symmetry than that of Ser Arryk Cargylle and Ser Erryk Cargylle, played by twins Luke Tittensor and Elliot Tittensor respectively. The pair had served side by side as Kingsguard knights until the war split their allegiances — Arryk siding with King Aegon, Erryk defecting to Rhaenyra's Queensguard. When Criston dispatched Arryk to infiltrate Dragonstone by impersonating his brother, Erryk intercepted him, and the two were forced into a fatal confrontation.

After killing Arryk, Erryk begged Rhaenyra for forgiveness before falling on his own sword. In the source novel Fire & Blood, their deaths are described thus: "In the end, Ser Arryk and Ser Erryk dealt each other mortal wounds, and died in one another's arms with tears upon their cheeks."

7. Prince Jaehaerys Targaryen

Season 2 opened with one of the most harrowing scenes the show has produced. Daemon hired two mercenaries, Blood and Cheese, to assassinate Prince Aemond — telling them he wanted "a son for a son." Unable to locate their target, they forced Queen Helaena Targaryen, played by Phia Saban, to identify which of her sleeping toddlers was her son.

The men then descended on young Jaehaerys and decapitated him in his crib. Helaena escaped with her daughter, but the scale of the atrocity was put on full display during the boy's public funeral procession through King's Landing.

6. Joffrey Lonmouth

The murder of Joffrey Lonmouth, played by Solly McLeod, was the moment House of the Dragon first revealed the depths of Criston Cole's capacity for violence. Joffrey — the lover of Laenor Velaryon, played by Theo Nate — approached Criston at Rhaenyra and Laenor's wedding with a seemingly diplomatic gesture, acknowledging their shared secret to forge a bond of mutual protection.

"You don't know me, Ser Criston, but we are both deeply invested in this union," Joffrey told him, adding that Laenor was "dear" to him. Criston's response was to beat him to death in the middle of the celebrations — a brutal and wholly disproportionate act that set the tone for his character across the rest of the series.

5. Laena Velaryon

Laena Velaryon, played by Nanna Blondell, had survived the deaths of others around her and built a life with Daemon after he murdered his first wife. The couple settled in Pentos and had two daughters, Baela, played by Bethany Antonia, and Rhaena, played by Phoebe Campbell. But Laena's third pregnancy proved fatal.

Faced with the same impossible choice Viserys had once confronted — save the mother or save the child — Laena refused to let anyone else decide her fate. She commanded her dragon Vhagar to burn her alive. Though the scene is deeply painful, particularly given Vhagar's apparent reluctance to comply, Laena's death on her own terms as a dragonlord gave it a brutal dignity.

4. Princess Rhaenys Targaryen

Rhaenys Targaryen had been one of the show's most consistently admirable figures — principled, fierce, and clear-eyed about the costs of war. Her death at Rook's Rest, at the hands of Aemond and Vhagar, was therefore all the more devastating. Even as she recognised that she could not defeat Vhagar alone, Rhaenys chose to keep fighting rather than retreat, inflicting serious damage on King Aegon and his dragon Sunfyre before she fell. Her loss left a genuine void in the story and among the fanbase.

3. Queen Aemma Targaryen

House of the Dragon announced its intentions in its very first episode by staging the death of Queen Aemma, played by Sian Brooke, in a scene of unbearable cruelty. When Aemma went into labour and complications arose, King Viserys — desperate for a male heir — chose to sacrifice his wife to save the unborn child.

The maesters cut the baby from Aemma's body, killing her in the process, with her agency entirely stripped away in her final moments. The grief was compounded when the newborn son, Baelon, died just one day later, rendering the entire sacrifice meaningless.

2. Prince Lucerys Velaryon

The death of Prince Lucerys Velaryon, played by Elliot Grihault, remains one of the most pivotal and emotionally damaging moments in the series. What made it so devastating was not just the loss of Rhaenyra's son, but the sense that the war might still have been avoided — until that moment closed the door on any reconciliation.

Aemond and Vhagar appeared to stalk Lucerys and his smaller dragon Arrax through dark, stormy skies in a sequence that unfolded more like horror than fantasy. Vhagar ultimately tore Arrax and his young rider apart. The ripple effects were immense: Rhaenyra lost a son, Jacaerys a brother, Corlys an heir, Rhaena a future husband — and Aemond earned a permanent reputation as a kinslayer.

1. Prince Jacaerys Velaryon

No death in House of the Dragon to date has landed with greater force than that of Rhaenyra's firstborn son, Prince Jacaerys Velaryon, played by Harry Collett — and it arrived in the very first episode of Season 3.

Jace had spent two seasons developing from an eager young prince into a genuinely capable strategist and a firm fan favourite. His mother Rhaenyra had consistently tried to keep him away from the front line, fearing his youth would cost him his life. She was right. In the Season 3 premiere, Jace locked Rhaenyra in her chambers and flew to the Battle of the Gullet in her place, determined to prove himself. While burning enemy ships aboard his dragon Vermax, he was targeted from below.

Vermax was impaled and dragged underwater, and though Jace unclipped from his saddle and survived the fall, he was quickly cut down by enemy arrows, his body left to drift among the dead. His death is the series' most tragic not only for what was lost, but for what it will cost Rhaenyra — a mother who has now buried two sons in her pursuit of the Iron Throne.