This article establishes representations of the urban typology referred to as "informal city" in the film Hechos consumados (An Accomplished Fact) (1986), using a methodological design to put mass media in touch with the city from the mediational perspective of Martin Serrano (2004). Likewise, certain categories were previously identified to observe this type of land use ("informal city") in a communicative product. This is an interdisciplinary study that may be of interest for both researchers of urban phenomena and those studying it through its representations in iconic mass media, such as, in this case, national cinematography as a mediational practice.