David Charles is now a Detective Sergeant serving in South London in a time when safe crackers did not go in armed which was why, as far as he was concerned, there was a really huge question mark over why Swan had been found dead in front of the open relic of a safe.
Man has proved many times that he/she is rarely monogamous but many will stick together for one reason or another and live out their lives in misery. But then some people will try and offset the misery by having a 'distraction'. Woe betide those who do....
Possibly the most depressed cop in the entire Metropolitan area - and the most rude - is far from happy when ordered up North to solve the murder of a young woman who was heavily pregnant..
His long suffering sergeant has endured enough by this time and plans to demand a transfer upon their return but circumstances prevent this as life changing events overtake the pair.