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The team investigates the seemingly professional killing of two scientists researching cancer while Van der Valk attempts to convince Hendrik to go to a doctor for his own cancer.

Pünd reveals who kills Melissa James – and it's not the person who already confessed. Susan learns some secrets about Lisa, and finds herself in danger. 

Farman worries about her son, Jack, especially as an investigation into the death of a property developer turns up connections to his friend. 

After another murder derails the investigation, the team begins to focus in on the missing Cobie, and her father and his very close neighbors. 

Susan learns that Alan Conway knew Frank Parris, whose murder inspired Atticus Pünd Takes the Case. She wonders about the parallels between Frank and characters in the book.

Another murder related to Jean Dixon shocks the team and leads them to wonder how (or if) they are connected.

Hendrik struggles as Van der Valk and the team investigate the murder of a bird-loving woman. The case brings up the disappearance of a pop star several years ago. 

Atticus Pünd and his assistant Madeline Cain speak to some of the many people with motive to kill Melissa James, while Susan looks into the reason for Frank Parris' visit to Suffolk.

When a body is found inside a tree, a cold case is reopened and an ex-detective disgraced by the team is brought back to offer insight into the investigation.

Van der Valk doesn't know who to trust as he and his team continue investigating the killings of two men about to testify against a crime lord. 

Susan visits a hotel to figure out how Atticus Pünd's investigation into the death of Melissa James in a novel relates to the disappearance of Cecily MacNeil.

Ridley and Farman have to determine whether Tasha can be trusted or if she has been compromised in her relationship with a suspect as they try to find Ryan's killer. 

When a witness is killed in a safehouse the day before he's due to testify in a trial, Van der Valk and his team are called into investigate. 

Susan Ryeland is asked to become a detective again when another book that she published seems to hold clues to a real-life murder and disappearance. 

Soon after robbing a jewelry store, one of the perpetrators are killed. Farman and Ridley suspect there's a connection to organized crime.