Sputnik (2020)

Sputnik (Russian: Спутник) is a 2020 Russian science fiction horror film directed by Egor Abramenko in his feature directorial debut. It stars Oksana Akinshina as a young doctor who is recruited by the military to assess a cosmonaut who survived a mysterious space accident and returned to Earth with a dangerous organism living inside him.

Plot
In 1983, during the last hot period of the Cold War, two Russian cosmonauts engaged in an orbital research mission experience something inexplicable while returning to earth: they see something moving outside their ship. The spacecraft malfunctions on re-entry, and only one of the cosmonauts, Konstantin, survives, but it is clear that something is wrong with him. He is taken to an isolated military facility, where Dr. Tatyana Klimova, a young psychiatrist under review for her controversial approaches, is brought in, recruited by the officer in charge, Colonel Semiradov. She is not told the real reason for Konstantin's quarantine, but she soon finds out that the cosmonaut brought back an extraterrestrial life-form inside his own body without knowing it himself. The creature comes out during the night, while its host is asleep. Colonel Semiradov reveals to her that she is here to determine how to separate Konstantin and the creature, since they seem to have developed a completely symbiotic relationship, with the creature living in the esophagus of the cosmonaut and benefiting from his nutrients, while Konstantin has made an impossible recovery from his injuries received when crash-landing.