A sitcom lucky enough to reach its fifth season has managed to navigate its vulnerable infancy, its nervous childhood, its awkward adolescence and its halting young-adulthood. Like most of us at that stage of life, it knows what it is — enough to convincingly fake it, anyway — and it can finally get on with the business of being that.
College is done, the world beckons, they're at peak confidence and vitality. The hard work's over, right? Smooth sailing!
Wrong. The real work is only beginning.