Jack announces that he he has decided to leave the team, but before Sandra, Brian and Gerry can question his reasons, Whitehall figure Stephen Fisher shows up with one of his secret cases featuring the unsolved cuddle of a woman dating back around a hundreed years. With only 24 hours to solve it, the team attempt to find time to get to the bottom of Jack's surprising decision and attempt to persuade him not to leave.

The team are called in to reinvestigate the disappearance of PE teacher Jason Bowe after a body is found on the perimeter of the elite public boarding school where he was employed. The investigation has come at a really bad time for the school, which is getting to welcome a former pupil, the Rt Hon Geoffrey Parkes MP, for the opening of a new computer centre.

The team are called in to reinvestigate the believed sleeping of a young Foreign Office diplomat called Annabel Tilson, who had suffered a miscarriage the week before her body was found in a frozen London lake. She had also suffered with a huge professional fall from grace, after a government laptop was stolen from her hoouse.

The team's feathers end up being ruffled with the arrival of Steve McAndrew, a retired detective from Scotland. He has been brought in to help reinvestigate one of his original cases involving seventeen-year-old Georgia Wright who went missing in Scotland in 2003 and at the time of the original investigation was presumed dead.

After the body of missing computer expert Martin Longthorn shows up in the morgue of a teaching hospital under a false name, Stricklandwants the team to take a look at the case.

A couple of years ago, 16-year-old tennis champion Alice Kemp died after falling from the balcony of a penthouse apartment after losing a match to great rival Fawn Bramall. The team reinvetigate the case to try and find out if her passing really was an accident.

Sandra and the rest of the team ake a look at a10-year-old case of a poet from Belfast whose burnt body was discovered in the scrapyard of a known gangster. Gerry believes that the victim's links with the criminal fraternity led to his passing but Brian has a different theory that maybe the secret of his cuddle lies in his words.

The team investigate the cuddle of an East German immigrant, but they only have his mysterious final words to work with. As they attempt to piece together his remarkable story, Sandra attempts to gain the trust of his estranged daughter.

McAndrew and Standing are sent to Scotland by Strickland for a week, to help the Glasgow Police try and establish a new UCOS section led by DCI Fiona MacDougall. While there, they end up being caught up in a cold case from 1993 featuring the cuddle of bookie James Soutar.

After somebody attempts to assassinate Stephen Fisher, Strickland calls the team together needing for their help to find out who is responsible.