Cat and Mouse

S1 E2: A paraplegic is beaten to death in his home and Tessa and Steve connect the murder to other unsolved murders which have recently occurred. The common link is a dice left at each crime scene and all the victims played games on the Internet. While Steve and Tessa try to track down the serial killer with the help of a computer whizz. Dee enters into a dangerous game of her own on the Internet.