Season 1 finale. When Balthazar arrives to the scene of a horrific car accident, he discovers the body of a woman a few yards away. Even though the police assume she was killed in the crash, it seems she had been dead for hours.

Balthazar and Bach finally track down a suspect in Lise's murder case, only to find he has been dead for 10 years and the real killer has been using the identity of the deceased; teenagers are butchered during a camping trip.

Balthazar is investigating the case of a man and a woman who were found in the forest brutally murdered. However, soon he finds himself in a world between fantasy and reality that will help him realize a great deal about his life.

When Balthazar is called to examine a young woman found dead in a truck, he is surprised to find that she is frozen solid. The police have few leads to go on, until Raphael discovers some DNA that connects the body to a cold case.

Balthazar and Bach travel to a remote mountain village when a husband and wife suffer a knife attack that bears the marks of a serial killer who is supposedly in prison.

When a woman is found hanging from a bridge, it appears to be straightforward suicide, but Balthazar finds it strange that another victim died the same way days earlier after using a blind-dating site.

In the shocking finale of season 3, Janvier manages to escape just as Balthazar prepares to have the happiest day of his life. But after everything he has been through, does he even still have the right to believe in happiness?

The realization that his wife’s killer might still be at large has left Balthazar in a state of shock. However, his duty cannot wait as he is called to examine a gruesome crime scene where a man was found beaten up and mutilated.

As he examines a dismembered body that was found in the river, Balthazar realizes there must be another victim. At the same time, he contemplates if he should share with Bach a crucial piece of information about Lise’s killer.

Balthazar analyses bones discovered in an old building and finds three bodies dating back to the Middle Ages, and one recent victim partially dissolved in acid.

After receiving a threat from Lise's killer, Balthazar worries his new girlfriend, Maya, is in danger; Bach is called to investigate a body found in a pond, but the case turns personal when she realizes the victim is someone close to her.

While at the cinema, Balthazar is called to help a young couple that has been stabbed. But when Buck interviews their families to figure out what happened, she realizes that there is more than meets the eye to the 'happy' couple.

After hearing an emergency call from a distressed teenager, Bach arrives at a crime scene with an empty car with smashed windows and a trunk full of snakes.

As the second season begins, the police are searching for a missing child, after they discover a dead dog with traces of human blood. Although the officers soon suspect the child’s nanny, Balthazar comes to a different conclusion.

Balthazar locks himself inside a derelict toy store after he examines a body and determines that the victim died from an accelerated version of the bubonic plague.

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After hearing an emergency call from a distressed teenager, Bach arrives at a crime scene with an empty car with smashed windows and a trunk full of snakes.

Balthazar relies on drugs to numb the pain when Lise's killer sends him a video of her being murdered; a disturbed man wearing a woman's bloody scalp walks into the police station.

The badly beaten body of a woman is discovered in a chapel and the DNA sample that Balthazar analyzes links her death to that of two other women in the past 12 months. Were these women truly the victims of a serial killer?

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