Wild, wild laughs, adventure and special-effects wizardry abound when megastar Will Smith reteams with the director of "Men in Black." Smith is agent James West, leading sidekick Artemus Gordon (Kevin Kline) and a sexy adventuress (Salma Hayek) on a perilous assignment: stop Dr. Arliss Loveless (Kenneth Branagh) and his contraption-driven plot to establish a Disunited States of America.