Bonnie Parker and Clyde Barrow excited the depression era, down-at-the-heels country with their derring-do. It was an age when gangsters offered some relief against the powerlessness most felt. PBS American Experience opens this season tonight with their true story. By all means watch the documentary and then the 1967 feature film. And buy a beret. You will have a touch of Bonnie's moxie as soon as you put it on.