Hal Linden returns to the stage for 'The Fantasticks,' the longest-running musical in history
 Hal Linden, 85, acknowledges he's not the most disciplined human being " and that turned out to be a good thing for his career. "If I had discipline, I would have been a professional musician," said Linden, who played the clarinet in big bands. "Today, I could be making hundreds of dollars a week....