Tomas Milian as the unconventional undercover cop with a pet mouse named 'Serpico'. Still difficult for an investigation commissioner Nico Giraldi, this time struggling with a gang who commits theft in luxury apartments in Rome.
Olimpia Di Nardo
Olimpia Trippetta
Giuliano Dell'Ovo
Scagnozzo del Mussulmano
Anna Bonaiuto
Cameriera Interrogata
Nello Pazzafini
Comandante della Nave
