TV is not real life-but it is for this guy. Danger Dan, fantasy action hero and purveyor of puns, punches and pudge, has been a Saturday Morning cartoon star for years. Now he lives in-character even when the cameras aren't rolling. But when an old friend comes calling, it sparks an identity crisis that threatens to tear his show apart. "Danger Dan" is so tongue-in-cheek it goes deeper until it licks your brain. The action toons that so define our youth, the ones that catch us again when we're older as PG-13 blockbusters with more raspy-voiced muscle men, were priceless. But living in one is...