The new medium of film with sound was developing at around the time Prokofiev returned to the Soviet Union, where in 1933 he composed the music for his first film, Lieutenant Kijé. Prokofiev’s remarkable perception of the medium’s unique requirements was enhanced by his collaboration with Sergey Eisenstein on Alexander Nevsky. The music was of epic proportions and the resultant cantata remains one of Prokofiev’s most brilliantly conceived and popular works. Leonard Slatkin’s classic Vox recordings of these works have been praised as powerful and compelling performances.