I am not alone when thinking of things in twos - Gillard v Rudd, Holden v Ford, Pepsi v Coke, Optus v Telstra... Two teams in a match, two birds with one stone, two peas in a pod. Two parties in a court case. Except - this last phrase is not always the case. There are two ways a person can become a third party to a traditional two party case – either as an Independent Children’s Lawyer or an Intervener.