A brutal murder on Glasgow's canals hits close to home when the victim is identified as a former police officer.
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.
Annika reflects on 1984 when the team investigate the death of a man found in a block of ice on the Hebridean islands.
Annika reflects on Jekyll and Hyde as she and the team investigate a millionaire found dead in his own shark tank.