The sole survivor of a mysterious 1983 space mission who unknowingly hosts a symbiotic alien. He endures isolation and amnesia while secretly hiding his connection to the creature. Driven by his desire to return to his son, he participates in an escape plan that culminates in a fatal choice to end the alien's cycle of violence.
Lead scientist responsible for the cosmonaut's medical monitoring.
Military commander exerting total control over the cosmonaut subject.
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