After the discovery of a dead body suggests ties to the Mafia, Montalbano finds an old friendship tested when a trusted colleague lands in danger. Luca Zingaretti, Cesare Bocci, Peppino Mazzotta, Isabell Sollman, Angelo Russo, Roberto Nobile, Marcello Perracchio, Tuccio Musumeci, Giacinto Ferro, Davide Lo Verde, Costantino Carrozza, Giovanni Battaglia, Carmela Gentile, Roberto Bonura, Francesco Colaiemma Added on Netflix 2021-05-12.