This Australian modern-day adaptation of “Anna Karenina” is gorgeously addictive and works just fine, with or without a working knowledge of Tolstoy. Sarah Snook stars as the wealthy and alluring Anna, who stumbles into a relationship that destroys her marriage and shatters her social circle. It’s all the fun of a soap but with potent ideas, nuanced performances and story momentum. Think “The Affair,” but actually good. — Margaret Lyons