The House of the Dragon error was first spotted by an eagle-eyed Twitter user, Sarah Capps. It involved the Paddy Considine character, King Viserys I Targaryen. In the scene, the king hands over a letter to a soldier. However, his fourth and last fingers are visibly wrapped in green gloves.
— Sarah Capps (@SarahC_821) September 5, 2022
The king had been suffering from an undisclosed illness since the series began. In an earlier episode 3 shot, his fourth and fifth fingers appeared rotten suggesting that his ailment had worsened. Consequently, the green fingers in this particular scene suggest that an artist forgot to edit the fingers.
The gaffe resulted in a massive uproar on the internet as Game of Thrones suffered from a similar mishap. In the fourth episode of the final season, audiences noticed a Starbucks cup at a table in front of Daenerys Stormborn, portrayed by the ever lovely Emilia Clarke. HBO eventually acted on the issue and edited the object out, but it was too late - it had become a meme.
For what it's worth, this is a small blot in an otherwise spotless spin-off show. It's only been three episodes, but many are already considering House of the Dragon one of the best shows of all time.
House of the Dragon will serve as a prequel to the Game of Thrones show which aired on HBO from 2011 to 2019 and is widely considered one of the best series of all time. House of the Dragon tells the story of the Targaryen civil war between the rightful heir, Rhaenyra Targaryen, and her half-brother, Aegon Targaryen, following the death of Viserys Targaryen, their father.
Given its predecessor's notorious oopsies, fans of the show were hugely disappointed that House of the Dragon made a similar mistake. However, given the show's huge following and the huge expectations of fans, we don't expect this minor mistake to have any adverse effect on its viewership, which has set a new HBO record.
In fact, HBO has already renewed the show for a second season because of its impressive numbers. This is further reinforced by the fact that more people are tuning in to House of the Dragon when you compare it to The Lord of the Rings: The Rings of Power.