Based on a serialized comic strip published between 1957 and 1959.
The Eternaut is based on the iconic Argentine graphic novel by Héctor Germán Oesterheld. The author was kidnapped and forcibly disappeared in 1977 by Argentina's last military dictatorship. Oesterheld's politically charged writing, especially his later reinterpretations of The Eternaut as a resistance allegory, made him a target. His four daughters also disappeared during the regime's repression. His legacy remains a symbol of artistic and political resistance in Latin America.
The Amateur Radio callsign used in episode 3, LU5DA is the callsign of Radio Club Rio De La Plata.