Airs Monday, January 27 at 11 a.m. This week on the San Francisco Symphony music director Michael Tilson Thomas retuns to lead the orchestra in Blumine by Gustav Mahler and the Symphony No. 6 in F major by Beethoven, his "Pastoral Symphony." Violinist Alexander Barantschik will also be featured as guest soloist in the Violin Concerto No. 4 by Schnittke.