Decades before Neil Patrick Harris was Barney Stinson, the prodigal, he played Doogie Howser, the prodigy. Since late last year, lucky viewers have been learning that -- hot as "How I Met Your Mother" may be -- Harris shined even more brightly in his first series, "Doogie Howser, M.D." The entertaining and thoughtful writing, bullseye casting and enlightened production of this four-season comedy about a boy-genius physician give it a singular spot on the list of extraordinary TV...