Natasha, a beautiful international assassin, arrives in Bologna pursued by secret services from around the world. Coliandro must defend her from them... and himself from her.

Coliandro must protect Giacomino, a peculiar, funny, and brilliant character who saw something he shouldn't have seen and is under death threat.

Coliandro must defend Remedios, a beautiful deaf girl, the only witness to the trafficking of a Latin American gang.

After a fall, Coliandro loses his memory and temporarily becomes a real tough guy, teaming up with a young nerd in the hunt for a gang of international terrorists.

Coliandro has to pose as a taxi driver for a trivial public safety operation, but a beautiful "crazy" woman climbs aboard and the situation changes radically.

After shooting two teenagers, Coliandro is forced to see a beautiful psychologist at the Ministry, who is dedicated to helping those officers most likely to use firearms.

Investigating the death of his cleaning lady's nephew, Coliandro uncovers an extreme fighting ring involving a series of wrestlers who are systematically drugged to relieve pain and fatigue. Helping him unravel the case is Veena, a beautiful and athletic fighter who escaped from this group of modern-day gladiators.

Coliandro believes Gamberini has relapsed into his old gambling habit and, trying to help his friend, infiltrates an underground gambling ring. However, in doing so, he undermines an ongoing investigation initiated by Longhi and puts Giacomino, whom he has hired as a consultant, Gamberini, and himself in grave danger. Thanks to the help of Ambra, the girlfriend of one of the gangsters, the inspector manages to escape.

Chief Inspector Vittoria Martello asks Coliandro to join the "Team", a team of superpolicemen who are opposed by Gamberini and other colleagues for their brutal and unorthodox ways. And in fact, thanks to Coliandro's entry into the Team, it turns out that the group is nothing more than a new gang of drug dealers and exploiters inspired by the action of the Banda della Uno Bianca.

Coliandro answers the mysterious phone call from a sensual female voice, telling him that a bomb is ready to explode unless he—and he alone—runs to defuse it. But there's more than one bomb ready to explode.

Coliandro is contacted by a girl who needs help: her boyfriend disappeared after stealing a smartphone and finding footage of a gang of Russian criminals inside. The young woman turns to the inspector because she often hears him mentioned by her aunt, the deputy prosecutor Longhi, who however believes that Coliandro is not a good policeman.

Coliandro witnesses an illegal motorcycle race between two riders, but one of them loses control and causes the other to crash, killing him. The inspector and Buffarini manage to save the motorcyclist responsible for the accident and find refuge in the Carabinieri station, but they must contend with the bloodthirsty local boss, the deceased rider's brother, who seeks revenge.

Kayo, a young Japanese doctoral student in art history, unwittingly witnesses a ruthless execution. She accidentally encounters Coliandro, who decides to protect her and hide her in his home with his brother Kenzaburo. Kenzaburo, who came from Japan to protect his sister, is a former yakuza informer, a fearsome Japanese mafia who is hunting them.

Coliandro seems on the verge of a successful conclusion to his romantic adventure. But, just as things are going, Giacomino shows up at his house, sleepy, hungry, and handcuffed. The motive is incredible: Giacomino is accused of committing a series of brutal murders. To help his friend, Coliandro must hunt down the real serial killer.

Coliandro is forced to be Paffoni's dance partner for an evening. To escape this unpleasant task, he finds himself investigating the murder of a young singer. He's helped not only by Paffoni, a skilled dancer, but also by Natascia, the young and beautiful new singer in the liscio orchestra led by the shady Vasinto and his wife Ersilia, known as "Vagona."

At the police station, Coliandro meets Asmareth, a young and beautiful Eritrean cultural mediator who works for the police. Believing her to be an illegal immigrant, Coliandro makes one blunder after another. To gain forgiveness, he agrees to help her with an investigation she's conducting into illegal work. Coliandro and Asmareth thus expose a gang organizing "manhunts" for bored, wealthy provincials.