Part 1 of 2. This two-part 2001 biography by Ken Burns and company is a Mark Twain Prize all by itself: a thoughtful examination that gives equal weight to the author and his writings, to the fiction and to the real life behind it. And, it turns out, Sam Clemens and his alter ego are perfect subjects for Burns, whose TV works, primarily, have all been about the examination of place and race. With Mark Twain, and especially with Adventures of Huckleberry Finn, you get plenty of both. Check local listings.