Beethoven: Violin Concerto — with Isabelle Faust (replacing Julia Fischer) as soloist
Mahler: Symphony No. 4 — with Juliane Banse as soprano soloist in the finale
all under the baton of guest conductor Mark Wigglesworth (replacing the originally scheduled guest, Yuri Temirkanov).
I really like the Beethoven concerto, and I'm very much looking forward to it. Unfortunately, they will not give the usual matinee performance on Friday, so you will not have the chance to listen to it then. But there will be the normal Saturday evening performance, and I expect it to be streamed over WCRB at 8:00 p.m., Eastern Daylight Time. And maybe WGBH will make it one of their Sunday afternoon broadcasts. Keep checking their website.
See the BSO website for more info.