Remember "Twin Peaks"? It's a good bet staffers at DDB Worldwide do, from a :30 the Dallas office created for Arizona Jean Co. apparel. The spot depicts the love affair between a young man and his logfriend, Leslie. The real goal is to show the comfort of the J.C. Penney Co.'s private-label line. Music shop JSM, New York, composed an original score for the commercial. Copywriter: Mark Koelfgen. Art director: Mike Martin.