Created by Daniel Écija and Álex Pina, it stars numerous actors; primarily Paco Tous and Pepón Nieto.

[5] Seasons six through eight of the series centered on a lesbian relationship between officer María Jose "Pepa" Miranda Ramos and forensic scientist Silvia Castro León.

[6] In season 9, dubbed as Los hombres de Paco 66.6, the series jumped the shark again, taking a supernatural turn by bringing Silvia back from the dead as a phantasmagorical apparition and pitting the lead characters against Satan.

[14] The series was also broadcast in Argentina, Bulgaria, Czech Republic, Poland, Hungary, Morocco, Romania,[15] Serbia,[16] Italy, Slovakia and Turkey.

[17] On 22 April 2020 it was announced that Atresmedia was preparing a return of the series after a decade-long hiatus and that filming would begin in the summer of that same year if the COVID-19 crisis allowed it.