Andris Nelsons and the BSO welcome violinist Gil Shaham, who has been a frequent guest at Symphony Hall and Tanglewood since his debut with the orchestra in 1993, for three concerts Thursday, October 5-Saturday, October 7 featuring Tchaikovsky's sweepingly passionate Violin Concerto. Opening the program is Moler by American composer and former Tanglewood Music Center fellow Arlene Sierra-a 2012 work inspired by the teeth-grinding habit brought out in a composer by a looming deadline. Closing the concerts is Rachmaninoff's 20th-century, hyper-Romantic Symphony No. 2.