Over a five month period in 1955 four women are stabbed to death in Montmartre after dark, a prostitute and a midwife among them - women with nothing in common beyond being brunette. Justice minister Morel leans on chief Inspector Maigret to catch the murderer and Maigret sets a trap, using policewoman Marthe Jusserard as a decoy. She survives an attack, sartorial evidence leading to married mother's boy Marcel Moncin, whom Maigret arrests. However whilst Moncin is in custody there is a further murder and Maigret looks to Moncin's family to help solve the murders. Written by don @ minifie-1

A series of vicious, murderous attacks on three wealthy farms in Picardy hit the national headlines and the elite Brigade Criminelle at the Quay Des Orfevres is called upon to lend its expertise in tracking down the brutal gang responsible for the slaughter. However, Inspector Maigret is resolute in investigating the murder of an obscure anonymous Parisian, an investigation that ultimately solves both crimes.

After telling Maigret she overheard a plot to kill 'the countess' club singer Arlette is strangled and soon afterwards the body of an elderly, reclusive countess is also discovered. Maigret believes a third person was present when Arlette was killed and is anxious to trace a man called Oscar, whose name Arlette cried out in her sleep. Meanwhile young rent boy Philippe, who shared the countess's drug addiction, n survives an attempt on his life but is too scared to help the police. Maigret finds out that both the dead women once lived at a Nice hotel, where the countess's husband died in odd circumstances and where Oscar also worked. This leads him to track down Oscar and to the closure of his case. Written by don @ minifie-1