I'm currently looking into using this API and im wondering if there is a way to tell if the episode list has been updated for a show, Does the last updated field on the shows results update when its episodes data has changed or are these seperate? Or is there another way, would rather not keep requesting every episodes data to check for changes frequently.
Yes, it would update the time when an episode is edited.
However the endpoint doesn't tell you what's changed, so you just have to get all of the show & episode data for that show again to account for everything.