Airs Tuesday, July 10 at 11:00 a.m. It's opening night for the gala 75th anniversary season of the Tanglewood Music Festival, the fabled grounds where Nathaniel Hawthorne wrote his "Tanglewood Tales". The Boston Symphony encores the exact program that Serge Koussevitzky conducted on August 5th, 1937: an All-Beethoven program featuring the Leonore Overture No. 3; the Symphony No. 6 ("Pastoral") and the Symphony No. 5. On the podium is Christoph von Dohnanyi, himself a Tanglewood fellow in 1952. Co-hosted by APM's Fred Child and the BSO's longtime "broadcast voice" Ron Della Chiesa.