For his first subscription concerts since being named the BSO's next Music Director, the young Latvian conductor Andris Nelsons leads music from the heart of the orchestral repertoire. The concerts begin with Wagner's Siegfried Idyll, a gentle tone poem composed for his wife Cosima's birthday. Nelsons and the orchestra are then joined by the brilliant English pianist Paul Lewis, who makes his subscription series debut with Mozart's Piano Concerto No. 25, one of the composer's biggest and most outgoing concertos. Brahms's robust Symphony No. 3, one of the greatest symphonies in the repertoire, closes the program.