Stream Dying to Do Letterman Online Free – Watch Full Movie from Home at 123Movies. . When 35 year old stand-up comedian Steve Mazan learned he was dying of cancer, he dedicated the rest of his life to making his dream come true: performing comedy on The Late Show with David Letterman. This documentary chronicles his five-year journey, as he races his own ticking clock to achieve a nearly impossible goal. Hilarious and heart-breaking, Steve brings a brand-new perspective to living with cancer. This is a story that proves it's not how much time you have, it's what you do with it. As Steve says, 'If you stop chasing your dreams, you're already dead.'