Armed with new DNA evidence, the team looks into the unsolved 20 year old murder of a Soho pornographer. Recently retired detective Danny Griffin arrives as Brian's replacement. He soon proves his worth, but Gerry thinks he's a mole.

In 1997, on the eve of the Labour Party's landslide victory, a younng political aide was murdered, The discovery of an offshore bank account in his name containing 40,000 Pounds puts the team on the trail of a mysterious Bosnian woman.