iTunes and Apple’s media devices typically do a good job of keeping track of what media you have or haven’t yet watched—but for those times when you don’t want a TV show, season, or movie marked the way it is, there’s a simple way to change it—right from the Apple TV.
When browsing through your TV shows or movies, simply select the episode or movie you’d like to mark as watched or unwatched, and hold down the select button on the Apple Remote to bring up a menu.
From there, you can mark the video as you see fit, and in the case of TV shows, will also have the option to mark the entire season however you want it.
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