I've been watching That 70's Show for some years now. I've wondered why on season 8, Eric Forman (played by Topher Grace) was not on the show.
So I looked it up and I saw that during the 8th season, Topher was filming Spider-Man 3, where he played Venom and the producers did not want him to be on the show.
Why is that? What was the purpose of him not being on the show? Could it be something so simple as to not having enough time to film both?