There are various theories about the endings and plot twists of several tv shows, including 'From', 'Outlander', 'The Boys', 'Euphoria', 'Stranger Things', and 'IT: Welcome To Derry'. Theories about these shows include possible character developments, betrayals, and connections to other characters or movies. It appears that fans and even some cast members are unsure about the meanings and implications of certain plot points in these shows.