In an encore from the 2013 Tanglewood season, soprano Camilla Tilling joins the BSO for the Symphony No. 4 by Gustav Mahler, and Isabelle Faust is the soloist in Mozart's Violin Concerto No. 5, with conductor Bernard Haitink.(Emphasis added)
Their BSO page, in addition to the above, has their schedule for the rest of the BSO's season, including rebroadcasts, and other links. The BSO's own performance detail page has links to program notes.