Australian actress Melissa George is about to nab the lead in the supernatural thriller “Triangle.”Christopher Smith (“Severance”) is directing.The story revolves around the passengers of a yachting trip in the Atlantic Ocean who, when struck by mysterious weather conditions, jump to another ship only to experience greater havoc on the open seas. Somehow, this plot sounds familiar.George will play a woman with a who relives the harrowing experience through each of her three personalities.