On her first day in the new role, Annika and the team are called in to solve the murder of a man found in the Clyde, a harpoon piercing his head. The investigation leads them to the victim's struggling boat business, where not everything is above board.

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?

Annika and the team are tasked with solving the death of a man 'everybody loved', who was thrown in the river from a party boat.

A young woman murdered on the Glasgow docks hits the team hard when Michael's brother is named as the next of kin.

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.

Annika reflects on Jekyll and Hyde as she and the team investigate a millionaire found dead in his own shark tank.