Watch Online Free on Watchseries. This film is about cats--actually, one very clever cat. The title is a play on the French quatuor, meaning quartet, but the chorus is not the usual alley-cat variety. The cat in this film is talented indeed. He is both pianist and piano, trumpet and trumpeter and, if need be, even becomes the music--a pulsing rock and roll--or a whole swarm of alley cats.