https://screenrant.com/house-dragon-aemond-targaryen-lose-one-eye-tease/

Aemond Targaryen is destined for a major change physically as he becomes a major player in House of the Dragon, as Helaena foresaw.

Episode 6 Immediately Destroys All Rhaenyra & Alicent Recast Concerns (https://screenrant.com/house-dragon-episode-6-rhaenyra-alicent-recasts-good/)

House of the Dragon season 1, episode 6 recasts Rhaenyra and Alicent, and its opening scene quickly banishes any doubts about the change of actors