4. Eric Foreman from That 70s Show
Another member of the That 70s Show, Eric Foreman was abruptly written off the sitcom. The fans of the show were left with a lot of confusion as to why he was no longer part of the show. Apparently the reason for him to leave was that he did not feel like doing any more TV shows. He just quit out of nowhere leaving the show runners with quite a mess on their hands.