Dickon Tarly appears in Game of Thrones as the younger son of Randyll and Melessa Tarly and the brother of Samwell Tarly. Introduced briefly in Season 6 and seen again in Season 7, Dickon occupies a clear role in his family, the heir groomed for Horn Hill.
His life is framed by training, duty, and the expectations of a martial house. That background explains why he behaves differently from Sam, whose interests lie in books and learning. When Tom Hopper took over the role in Game of Thrones Season 7, the character’s screen presence shifted toward a more physical and steadier figure.
Although Dickon’s time on screen is short, it shows how family loyalty and public duty can collide with personal feeling. His story moves from routine scenes at Horn Hill to the shock of battle and ends with a stark punishment that underlines how choices during war have direct, painful consequences for ordinary people.
Dickon Tarly’s place in House Tarly

Dickon is brought up as the probable heir of Horn Hill since his older brother, Sam, is not considered a suitable lord. From childhood, he was taught to hunt, wield a sword, and manage a noble house according to its rules.
Through these lessons, he is admired by his father and given the hope that he will continue bearing the family name. This upbringing influences how he acts in the series and the reason why he is on the side of his father when it comes to power.
The recast and what Tom Hopper brought to the part

The character was played by a different actor in an earlier appearance, but scheduling led to a new casting for Game of Thrones Season 7. Tom Hopper’s portrayal emphasizes physical strength and discipline, fitting for someone raised for combat and command.
The change does not alter Dickon’s family ties or choices, but the new portrayal gives the character a firmer, more outwardly confident tone during the scenes he appears in.
Key moments that define his brief arc in Game of Thrones

Dickon is present at court and on the march with his father. One clear moment occurs during the battle, often called the Loot Train ambush, where he acts to protect Jaime Lannister from a Dothraki attacker. That single action shows skill and quick thinking under pressure.
After the fight, he quietly reflects on the cost of war, noting that many of the fallen were people he had once hunted with. That reaction adds a human dimension to what might otherwise be just a list of martial deeds.
Capture and the final punishment

After refusing to bend the knee to Daenerys, Dickon and his father are taken prisoner. Their refusal leads to an execution carried out by dragonfire.
The scene is abrupt and severe, and it brings a private loss into the larger sweep of the conflict. When Sam learns of their fate, the news serves to connect the distant politics of war with the immediate pain felt by a family.
Dickon Tarly may not dominate the story, but his role in Game of Thrones is clear. He represents the young noble trained for duty, caught by events that force a harsh choice.
Tom Hopper’s portrayal gives that figure a physical steadiness that fits the part. The Game of Thrones characters’ arc training, combat, regret, and a final stand show how the series ties personal costs to broader political moves.