What exactly is steampunk? We’ll meet some musicians who are making the dusty Victorian era new all over again. Kurt Andersen finds out why the presidential campaign ads have lost their edge. Mark Helprin (Winter’s Tale) reveals that his new novel — a story of war, romance, and gangsters — is actually based on his family. And singer-composer Shara Worden (who performs as My Brightest Diamond) plays live in the studio.