In this episode, the officers of the Scottish Police Force find themselves educating the educators, laying down the law to lawyers, and painting some graffiti artists in a good light. 

Refusing to rest on his laurels, Chief Commissioner Cameron Miekelson continues to strive for excellence. However, whether he is launching his new #SlateHate initiative to support the disabled community or ordering top-of-the-range gloves for his officers, nothing seems to go perfectly to plan. 

On the roads, the traffic cops find themselves in a dilemma - should PC Singh ticket his daughter's teacher for speeding, or will it affect the casting decision for the upcoming school play? Fortunately, his colleague PC Hugh McKirdy is on hand to provide his own brand of roadside assistance. 

City police Fletcher and McLaren uncover a crafty criminal at a murder mystery party. Mindful of their duties, they bring in the bad guy without killing anyone's evening. Elsewhere, there is a reunion of partners as PC Charlie McIntosh and PC Jane Mackay catch up in court, giving evidence on a big case in the countryside. The pair reminisce about their time together, and Charlie gets a chance to cross-examine Jane's new partner, PC Washington. 

Keen to connect with the kids, the Scottish Police Force has created the new role of youth liaison officer. Fresh-faced recruits are fast-tracked to the street in the hope that young people will feel police-positive if the PCs are similar in age. The first of these officers is PC Eleanor Hipgrave, who can't wait to connect with the young community. Will her peers be pleased to participate in this promising policing programme? 

The final episode of the series sees the Scot Squad continue their relentless pursuit of misdemeanour, misdeed and malfeasance, finding themselves falling victim to hunger, alcohol and the irresistible laws of attraction. 

When it comes to Mother Nature, Chief Commissioner Cameron Miekelson is a self-proclaimed 'mummy's boy', and as such, he is acutely aware of climate change. In preparation for the potential change in Scotland's weather, he has designed some new uniforms to deal with whatever the climate, and the criminals, can throw at his officers. Come hail, rain or shine, nothing will stop the police shutting down shenanigans. 

Back together as policing partners, PCs MacIntosh and Mackay are called to an illegal drinking den. However, as they bust the boozy bar, it becomes clear that this speakeasy isn't quite what it seems. Meanwhile, detectives Squire and McGill are on a lengthy stakeout, poised to pounce on their perpetrator. However, without sustenance, can these professionals handle the hunger long enough to capture their prey? 

Elsewhere, love is in the air as remote investigators Annie McInnes and Archie Pepper take a little time out from cracking down on cyber criminals to celebrate Valentine's Day. Traffic officer Hugh McKirdy is also feeling amorous, as his colleague PC Surjit Singh helps him present his best policing profile on some dating apps. Can Hugh finally find the woman of his dreams, or will it turn into a nightmare yet again?