Watch Online Free on Watchseries. In a pair of passionate performances, American composer Leonard Bernstein conducts the New York Philharmonic in Tchaikovsky's Symphony no. 4 and Andante Cantabile, then leads the Boston Symphony Orchestra in the Russian composer's Symphony no. 5. Russian violinist Boris Belkin also makes his American debut as the soloist in Tchaikovsky's Violin Concerto in D Major.