For the third concert program of its 2009–10 season, the Orion Ensemble performs the work that inspired its season-long theme of “Musical Connections,” Robert Kritz’s “Connections” for Clarinet, Violin, Viola, Cello and Piano, which he wrote for Orion in 2001. Also on the program is the infrequently performed Quartet in B-Flat Major for Clarinet, Violin, Viola and Cello, Op. 18 by Heinrich Baermann, considered the 19th century “Rubenstein of the clarinet,” and the more popular Trio in A Minor, Op. 50, for Violin, Cello and Piano, which Peter Ilyich Tchaikovsky wrote as a memorial to his mentor and friend Nikolai Rubinstein.