The scene in question sees Paddy Considine's King Viserys hand a message to a soldier, revealing two of his fingers sporting a green screen glove, hinting that they were meant to be removed in post production. This would have shown how the mysterious illness that afflicts him continues to develop.
Twitter user @SarahBKnowsBest spotted the mistake on Twitter, which she posted alongside a picture.
As was the case with the infamous Starbucks cup, it's likely the fingers will be edited out shortly despite the episode having already been released, and updated on streaming.
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