第 9 季 共 10 集
播出时间：2012年8月28日
第 1 集 A Death in the Family
播出时间：2012年8月28日
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 murder of a woman dating back around a hundred 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.
第 2 集 Old School Ties
播出时间：2012年9月4日
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.
第 3 集 Queen And Country
播出时间：2012年10月10日
DS Pullman breaks the rules to explore a possible cover-up at the Foreign Office.
第 4 集 The Girl Who Lived
播出时间：2012年9月18日
Retired DI Steve McAndrew from Glasgow joins the team to reopen one of his old cases when the DNA of a woman who went missing as a teen turns up at the scene of a petrol station robbery.
第 5 集 Body of Evidence
播出时间：2012年9月25日
The team become concerned that undercover police operations may have been compromised when the body of a computer expert who worked with the Met turns up under a false name at a teaching hospital.
第 6 集 Love Means Nothing In Tennis
播出时间：2012年10月2日
The team investigate the death of a 16-year-old tennis star who fell—or was pushed—from a penthouse balcony after she lost an important match to a rival.
第 7 集 Dead Poets
播出时间：2012年10月30日
UCOS re-open the case of Sean Docherty, a talented young poet whose burnt body was discovered ten years ago in the scrapyard of a known gangster. While Standing is convinced that the murder is related to Docherty's criminal connections, Lane is sure that the answer lies in his poetry.
第 8 集 Blue Flower
播出时间：2012年10月16日
The team investigate the murder 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.
第 9 集 Glasgow UCOS
播出时间：2012年10月23日
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 murder of bookie James Soutar.
第 10 集 Part of a Whole
播出时间：2012年10月23日
Thirty years ago, Strickland and a group of his associates, including Stephen Fisher, were involved in a covert operation on behalf of MI5. Now, someone is trying to kill all the members of that group and Strickland turns to the UCOS team for help.
