When a body is found on a boat in the Clyde, the case takes the team to the Isle of Bute. Evidence points to a jilted lover, but a darker secret emerges as the team investigate.
When the body of a scientist is found in Loch Katrine, Annika is reminded of Ibsen's Enemy of the People. But with so many wanting him dead, which one did he push over the edge?
The team are called in when writer Cara Gibson is found dead under a bridge. Her books ruined careers and left a lot of lives in tatters, but which of these people would be driven to murder?
A young woman murdered on the Glasgow docks hits the team hard when Michael's brother is named as the next of kin. Michael is taken off the case while his brother is investigated.
When a phone with a brutal drowning recorded on it is handed in to MHU headquarters, the pressure is on for Annika and the team to track down the murderer.
The MHU are sent to Edinburgh to investigate the death of a recently released prisoner whose body is pulled out of the Forth River, imprisoned in a dog cage.
When Morgan starts working at a remote Scottish eco-resort, Annika's trip to visit her is interrupted when a local builder employed by the resort turns up dead in a nearby stream.