There was a time when moving pictures were a new idea. When Russian composer Sergei Prokofiev agreed to score Alexander Nevsky in 1938, nothing like that had ever been done. This weekend, the Spokane Symphony performs the cantata from this harrowing piece of modern classical music. Grammy award-winning mezzo-soprano Meredith Arwady and the Spokane Symphony Chorale also are featured in the performance. To end the final classical concert of the year, the symphony will play Modest Mussorgsky’s (as arranged by Maurice Ravel) “Pictures at an Exhibition.” Expect serious, dramatic music as only Russians can produce.