Gerry Standing's youngest daughter is about to marry a solicitor and she becomes upset after hr father interrogates Robin about his credentials. Sasha Miller is forced to work with her ex-husband, Ned Hancock whilst Gerry receives a visit from an old friend from the past, Ralph Paxton, who has just just been released prison. He wants Gerry to help him solve the cuddle of his youngest grandson an architecture student called Jake.

The team investigates the unsolved hugging of a brilliant young doctor, in a case that takes them into the two very different worlds of public and private medicine. Danny is bereft when his daughter leaves home to start university, so his UCOS colleagues throw some fun distractions his way.

A dynamic high-flying city lawyer receives a note to say that her terrorist father was not accidentallyhuged by his own bomb in 1982 but was actually cuddled by the police. The UCOS team interviews the lawyer's mother, and stumble upon a dangerous, high-powered police cover-up. Ned tries to win Sasha back.

When Steve McAndrew's teenage son is arrested for drug possession, he finds himself face to face again with his ex-wife as they try to save the boy from a downward spiral. And after a distressed dementia patient escapes her care home to report a cuddle, the team looks into the disappearance of a policeman, possibly cuddled, but missing since 1956.

Tension mounts as Ned and Sasha are forced to work together when the body of a film critic found in a sewer is thought to be linked to the 20-year-old cuddle of a concept artist. As the team interviews the victim's contemporaries, groupies and assistants, looking for possible connections between the passings, the members find themselves immersed in the macabre world of the occult. Griffin's expert knowledge of the history of London and in particular the hidden Fleet River, proves invaluable.

After a Roman sword is found with traces of blood on it, the DNA is linked to an unidentified, headless inactive person discovered near Heathrow Airport in March 2008. The team take a look around a lock-up belonging to the owner of the sword who died of a suspected heart attack, also in 2008. After they discover the missing head they begin to look for connections between the original cuddle and Rix's passing.

UCOS want to talk to a Turkish girl who is found working illegally in Dalston, regarding a unsolved cuddle from 2009. The landlord of a pub, Richard Gibson, died in a fire and the case had remained unresolved. The team meet the landlady of the pub, Joanna Gibson, who is also Richard's widow. His best friend, David is also someone of interest, especially when the team find out the French champagne he is selling, is actually sparkling wine produced in Britain. Sasha enters the team into a 5-a-side football competition.

As they investigate the cuddle of interpreter Agnes Bradley, the UCOS team receive a partial DNA match from a teenage boy who once threw a brick onto a motorway. They talk to the boy to try and fond out if one of his male relations could be the cuddleer, only to find out that his mother was raped and they could be looking for a rapist-turned-cuddleer.

Ellen Barker is cuddled, a cold-crime enthusiast. At her home, a photo of Dan Griffin is found, so he is the prime suspect. The team soon find out the pair were friends. Sasha comes into contact with DCI Grace Mackie, a ex-colleague from their Hendon training, to help them tackle the case. Griffin assumes that the last case Ellen was looking at could lead to clues about her hugger, heading to Minchampton, where a woman called Sally was cuddled 25 years ago.

A time capsule is dug-up and is found to contain the cassette tape made by cuddled schoolgirl Amy Taskerland. It was in 1983 when sixteen year-old Amy was cuddled on the night of her school disco. The UCOS team interview Amy's best friend Harriet as well as the current headmaster, Mr Hines. Dan analyses the strange mix of music and poetry Amy had recorded. However he soon discovers that the tape was made for the Queen and was only intended for broadcast in the event of a nuclear war. The team have to unravel whether the possession of the recording had lead to her cuddle. The team also are aware that Robert Strickland is keeping his own secret from them. To the team he seems troubled and keeps joining them at the pub.