Based on “Old Possum’s Book of Practical Cats,” a collection of poems by T.S. Eliot, Cats, which contains no spoken dialogue, revolves around the antics of such feline characters as Old Deuteronomy, Jennyanydots, Mr. Mistoffelees, Rum Tum Tugger, Skimbleshanks and Grizabella who sings the hit song “Memory.”