Mystery

Geordie and Will discover a strange convent that appears suspicious, while Will tries to grapple with his guilt in the wake of the scandal at the boxing gym and Leonard's father visits, in the season finale of Grantchester

A tragedy at the boxing gym leaves Will shattered as he learns about the plight of his favorite charge, Matthew, as well as the other boys and their desperate attempt to escape their troubles. 

A young man streaks through the streets yelling about aliens, then is found dead in a fen. The incident leads Geordie and Will into the world of LSD trials and psychotherapy, while Cathy and Geordie deal with Cathy's mother. 

A disturbance at a movie theater has a connection to a minor crime committed against Mrs. C. It eventually reveals a part of her husband's past that was hidden, while Will struggles to help the troubled young Matthew.

Ellie ends up helping Will in the investigation of a hit-and-run involving two reclusive brothers and an unscrupulous investment broker when she shows up looking for a lead, while Geordie and Will face issues with mothers in their lives.

Will and Geordie investigate the death of a woman at one of the few female colleges in Cambridge, discovering misogyny, secret drinking societies, and a world of fancy balls in the return of Grantchester.

Baptiste and Genevieve search out the Romanian gang's inside source in the Amsterdam police while Edward continues to try to help Natalie's kidnapped sister, Cristina, and the investigation winds to a close.

Baptiste searches out Edward and the money and concocts a plan with Genevieve to try to turn Constantin to inform on the Romanian gang, while Edward tries to protect his ex-wife.

Martha's life begins to crumble as Genevieve steps into the investigation into Constantin, while Baptiste continues to search for the money and Edward is pressured from all sides, leading him to make a drastic decision.

As Baptiste learns the truth about Edward, his family is put in danger. Europol becomes involved as Baptiste works more closely with the Amsterdam police, including Martha and Niels. And more is revealed about Natalie. 

Baptiste begins to learn how little he knows about Edward Stratton, the man he was helping search for Natalie Rose. The investigation widens to include a Romanian gang. 

The retired French detective Julien Baptiste is asked to help search for a missing girl while staying with his daughter in Amsterdam. The case embroils him in the work of a dangerous Romanian gang and leads through Amsterdam's red-light district.

Max and Oskar try to discover the identity of a murderer via a creation of a psychological profile of the killer, angering powerful people in the process. Max struggles to understand what he wants in his personal life. 

An eager young doctor studying the new theories of Sigmund Freud observes a criminal case under the wing of a hardboiled inspector, and soon turns his observational powers and Freud's ideas to use solving the crime. 

Cathy contrives a plan with Mrs. C to do something about the predatory Anthony, a situation that has made Geordie angry all the time and leads him to overstep in an investigation of the death of one of his daughter's classmates, in the season finale.