The Winter's Tale , one of Shakespeare's very late plays, is filled with improbabilities. Before the conclusion, one character comments that what we are about to see, "Were it but told you, should be hooted at / Like an old tale." It includes murderous passions, man-eating bears, princes and princesses in disguise, death by drowning and by grief, oracles, betrayal, and unexpected joy. Yet the play, which draws much of its power from Greek myth, is...