Rose goes to the island to find out what Carl couldn't. Akram finds a note which sends the investigation in an entirely new direction.

DCI Carl Morck returns to work after a near-fatal incident and finds himself head of a new department. A prosecutor faces a tough day in court.

As Carl and his new assistant start digging into their first cold case, he can't stop his personal demons encroaching on his professional life.

A decades-old recording helps all the clues to fall into place. But as the pressure rises — in and out of the chamber — can Carl get there in time?

The prosecutor's disappearance becomes connected with a death. A scuffle in a newspaper office sees Carl making headlines, and Moira sees a therapist.

Carl makes some dangerous allegations to some powerful men, while Rose takes a fresh angle to uncover more information about Sam Haig.

The kidnappers give their victim a clue as they press her for an answer to their question. Dept. Q gets closer to unravelling its own riddle.

Carl and Akram recreate the fateful ferry journey on their way to the Isle of Mhòr. A frustrated Rose makes her case for joining their Department.

The police detain a suspect for the Leith Park shooting. Carl returns to the scene of the crime, before losing his temper in public once again.