 Sydney must travel to Sri Lanka to outwit Sark in order to find a crucial piece of Intel from a computer disk that she recovers from Rabal. Meanwhile, Jack faces Sydney s mother for the first time in almost 20 years in her prison cell to discuss Sydney s well being. Also, Will finally meets Vaughn, and Sloane is haunted by his wife s death when someone begins sending him anonymous letters which have Emily s handwriting on them.