Based on Maigret Sets a Trap.
Maigret is under heavy pressure from his superiors and the press because he has failed to catch a serial killer of women with no common feature, except their hair. Maigret sets a trap using undercover police women. The trap yields a clue to a suspect with a wife and mother, both very possessive, just as the decision to replace him as lead investigator brings the pressure to a boiling point.

Based on Maigret's Dead Man.
One morning an agitated man calls the Police judiciaire asking for Maigret. He claims he's being followed by someone trying to kill him. Before Maigret can get the details he hangs up, calls back again from various cafés until the calls finally stop. That night his body is found, his face badly beaten and has been stabbed to death. Riddled with guilt for not having saved "his" dead man, Maigret is determined to find the murderer.

Based on Maigret at the Crossroads.
The body of one Jewish jeweller is found in the car of a Danish national who lives with his sister. When the man is taken in for questioning, he denies all knowledge of the murder, but establishing his true identity is problematic. Maigret attends the funeral of an old colleague, and then works with another old colleague on the case.

Based on Inspector Maigret and the Strangled Stripper.
Arlette, an exotic dancer at the "Picratt Club" comes to the police for help, telling Maigret about a "countess" who is in grave danger, but she then flees distrustful and afraid. Soon afterwards she is found murdered; then the countess's body is discovered. Maigret must discover the link between the two women, as he and his men hunt for the killer in Montmartre's streets.