The Murder Investigation Team is called in when Ed Villarin, a young Lithuanian, collapses and dies in the street during a game of 'phone tag', in which strangers join the game over the internet and must 'hunt' and photograph the 'target' with their mobile phone.

The Murder Investigation Team uncover a vipers' nest of malpractice and drug dealing after a popular registrar, Karl Anderson, is pushed off a hospital roof.

The team investigates the death of Sean Reynolds who is found dead at the wheel of his car. Reynolds was a professional footballer and the autopsy reveals that he died from a severe blow to the back of the head. His wife confirms that her husband had been receiving hate mail and threatening phone calls. As he was about to leave his football club as a free agent, it was put down to irate fans. The investigation leads them to a particularly rabid fan, Jason Phelps, but his information leads them right back to a more likely suspect.

Sexual tension among the Murder Investigation Team is revealed when a crime scene colleague is found strangled in her flat.