Moebius is a 1996 Argentine science fiction film directed by Gustavo Mosquera, and starring Guillermo Angelelli, Roberto Carnaghi and Annabella Levy.

Upon looking for the original plans of the line at a national archive, Pratt discovers that they are missing and were taken away by his former lecturer at the University of Buenos Aires, Hugo Mistein.

The girl is told to wait on one of the platforms while Pratt addresses the director and numerous officials tasked with getting to the bottom of the UM-86 mystery.

The group return up the station and Pratt reveals his complex theory: that the construction of the perimeteral line has turned the network into a form of Möbius strip which, under the right conditions, caused the missing train to pass into another dimension.

After seeing a roller coaster at the Parque de la Ciudad, Pratt is inspired to make a series of mathematical calculations, perfecting his theory.

He quickly returns to the underground line and begins taking notes throughout the day on the movements and schedules of the different trains, coming to the realisation that UM-86 is soon to appear.

The shaken-up Pratt continues through the maintenance areas and finds himself at another station, named after the Argentine writer Borges (an intentional decision by the director of the film).

It is noteworthy that Argentina's Full Stop Law (“Ley de Punto Final”), which allowed the juditial impunity of crimes against humanity committed by the Argentine Armed Forces, was passed in 1986, coincidentally corresponding to the subway train number UM-86 in Moebius; this law mandated the end of investigation and prosecution of the military government authorities and/or subbordinates accused of political violence and the murder of 15,000 to 30,000 citizens who disappeared during Argentina's last military dictatorship (1976–1983).