Overview: Miguel is chopping wood because he wants to play the violin. He asks Robin to take the wood to Carlene Hutchins, who makes violins, a musical acoustician. She tells how the violin's shape determines its sound. And she makes a violin from wood strips. FILM INSERT: Animals to evolve shapes that help them. In Lordstown, Ohio, Miguel meets Denby, who insists he is not a robot. He invites Miguel into the Chevrolet plant to see true robots at work. Robin, Kathy and Miguel sing Row, Row, Row Your Boat in a round as they walk from the subway to hear a string trio rehearse. At the hall, they meet the trio: Eugene Moore, Ida Kafavian and Marcus Thompson. At Miguel's request, the trio play Frere Jacques in round. All three musicians tune up to play a fugue by Bach. In a fugue, once they play the initial melody, musicians begin imitating each other. THE BLOODHOUND GANG: ""The Case of X Marks the Spot, Part Two."" Cece explains that someone has switched a map of what may be Captain Kidd's bu