When Anacleto enters Vazquez's cell, it is full of pictures and caricatures of Anacleto. These caricatures show Anacleto as he was depicted in the original comics of Editorial Bruguera.
Anacleto was created by Manuel Vázquez in 1964, inspired by Maxwell Smart from Agente 86 (1965). It includes the black suit with bond tie and a smoking cigarette in the mouth.
When Adolfo asks Anacleto what G.P. stands for, he answers that he doesn't know. This is a reference to the fact that the meaning of the acronym was never explained in the original comic.
The appearance of G.P.'s offices resemblance the visual look of the offices in Spain of the middle 60's, accurately the time of Anacleto's creation.
The quote "Anacleto nunca falla" (Anacleto never fails), said several times, is the leitmotiv of the character.