Searching for evidence underwater, Nurmi gets unexpected company. Karppi figures out what the white capsules in the diving video are and lays a trap.

As Karppi and Nurmi put the final pieces together, they learn — perhaps too late — that the target of their pursuit won't go quietly.

Karppi's case takes a turn when human remains are found in the sewer. Nurmi visits Laura in the hospital. Henna faces heat from all sides.

Following a shocking confrontation atop a building, Karppi and Nurmi realize that Anna Bergdahl's murderer may be someone they've not yet considered.

Henna makes a desperate call, Nurmi has a painful reunion with an ex-flame and Karppi comes face-to-face with an unwelcome visitor.

Karppi suspects there may be a deeper layer to the case, but not everyone agrees. Meanwhile, Henna makes a startling confession.

When a woman is found in a cage brutally murdered, Karppi and Nurmi focus on learning everything they can about the victim — and her troubled son.

While searching for a missing suspect, Karppi and Nurmi make another grisly discovery. A cryptic clue hints at the killer's motive.

Karppi and Nurmi investigate if a teen's overdose is connected to their case. Henna goes snooping. Karppi chases a lead in her husband's death.

An unexpected encounter leads to more clues about Karppi's husband. The detectives unravel a common thread among the victims.

Karppi and Nurmi travel to Anna's hometown after learning she visited her estranged parents right before her murder. Alex's business suffers a setback.

Usko seeks revenge, shifting the police's focus onto him. After a night of drowning their sorrows, Karppi and Nurmi look at the case's big picture.

Detectives Sofia Karppi and Sakari Nurmi investigate two murders and their possible connection to an enormous construction project.

The police go on a frantic hunt for Iida while Henna struggles with a dangerous situation. A profile of the kidnapper comes into focus.

Karppi and Nurmi dig for answers in hopes the mayor is still alive. Henna's quest to wipe away a debt takes an alarming turn.

Fueled by desperation, Ossi makes a move. Karppi receives an intriguing call about her late husband. Nurmi has a brief — but painful — reunion.

Now on the run from the police, Karppi fights to continue her investigation. A terrified Henna finds herself in mortal danger.

As Karppi grieves a painful loss, she and Nurmi search for the meaning behind a cryptic clue written in blood.

Karppi has a contentious conversation about her son. The mayor finds herself in danger, both politically and personally.

Karppi and Nurmi track the suspect to the ruins of an old convent, where they discover that the case is anything but over.

Karppi and Nurmi look into the Lexus's connection to Anna. Alex Hoikkala receives a startling ultimatum. Usko takes offense to a police theory.

A co-worker reveals a clue to Anna's future plans. Linda finds herself in harm's way. When Karppi is sidelined, Nurmi gets a chance to show his mettle.

Karppi searches for Roope Hoikkala and Henna, who've disappeared for very different reasons. Usko and his daughters face a difficult day.

A new autopsy changes the timeline of the murder. Nurmi gets an unexpected therapy session. Usko goes shopping on the black market.

A former suspect offers up surprising information about Anna's years on the swim team. Alex tries to confirm who was behind the new test results.