"TV Dinners" have really progressed and are very reasonable dinner choices any more. Especially if go for the more "health oriented" brands like Lean Quiseine, Kashi or South Beach.
Many of those dinners are under 300 calories, offer 5+ grams of fiber, 20 grams+ of protein, very generous helpings of veggies, and very minimal amounts of fat (less than 5 grams).
It's hell of a lot better than what most people either bring in from home for leftovers or pick up from a sandwhich shop.