While That ‘70s Show’s bizarre Hyde twist seemed to come out of nowhere, the revelation was subtly (and perhaps even accidentally) foreshadowed in the season 5 premiere. Like so many “hang-out” shows, That ‘70s Show fell victim to a classic problem when the sitcom reached its later seasons. That ‘70s Show started life as the story of a group of teens navigating high school in the titular decade but, by the show’s later seasons, the cast was mostly far too old to play teenage characters and their storylines had grown stagnant as the show’s premise required them to stay put in Point Place.

https://screenrant.com/that-70s-show-eric-hyde-father-twist-hint/