The Four Seasons with Geoff Nuttall, Matthias McIntire, Paolo Bordignon, Nicole Johnson and Marc Johnson at the Rockport Opera House, 6 Central St. Cost: $40 or $30; $8 younger than 19; plus season and series pass discounts. Pre-concert talk by Manuel Bagorra/post-concert reception at CMCA. FMI: 236-2823; 888-707-2770.