Katey Sagal's 8 Simple Rules widow may still be mourning the death of her husband (played by the late John Ritter), but that doesn't mean other guys can't look, right? Adam Arkin had better hope not, because beginning May 4, the former Chicago Hope doc will do just that as a man from Cate's past who is eager to become a constant presence in her life. The actor will appear in this season's final three episodes, and — although I'd hate to jinx things by saying too much — word is, we'll see a lot more of him next season.