All this month, TCM is devoting Mondays and Tuesdays, day and night, to the Western, with a 100-film retrospective, hosted by Keith Carradine. And the entire thing begins today, early, at 6:15 am. ET, with the first Western ever filmed: 1903’s The Great Train Robbery, the Edwin S. Porter-directed action film, fewer than 15 minutes in length, that ends with a famous shot of one of the bad guys pointing his gun directly at the audience and firing.