Sandra Pullman heads a new unit whose debut case is to look into the 1981 murder of a nightclub hostess.

Three detectives are brought together to crack unsolved crimes from the past. Tonight, the UCOS team reopens the case of young police cadet Kate Daniels, brutally murdered in 1987.

The Unsolved Crime and Open Case Squad gets a taste of royalty when they are brought in to investigate art fraud in the Queen's private collection.

The murder of a peace campaigner at a NATO base in 1984 takes the Unsolved Crime and Open Case team back to a time of conspiracy, paranoia and police hatred.

This week, Sandra Pullman and her Unsolved Crime and Open Case team are called upon to investigate the apparent suicide of a teenager from 20 years ago.

The UCOC squad fears they may have uncovered a serial murderer when they revisit a missing mother and baby case from 30 years ago.