"Altered Carbon" had sleeves, "Star Trek" had the Vulcan katra, "Battlestar Galactica" had the Cylon Resurrection Hub and even "Stargate SG-1" had Ma'chello's body-swap device in the episode "Holiday" (Season 2, Episode 18). The transplantation of human consciousness has long been a mainstay of contemporary science fiction, but have you ever wondered how it might have all begun?
https://www.space.com/42153-keanu-reeves-replicas-new-trailer.html