This is one of the silliest episodes I've seen so far. And Black mirrors doesn't have a shortage of silly episodes. Again as many reviewiers have mentioned, why not send replicas to space and leave the real astronauts on earth with the families? Lazy writing. Besides even science fiction has to have some internal logic, which this episode seems to lack totally: you have computers and equipments that date back from the 1960s yet you have replica robots that are not even with a futuristic technology of 2260 would not have been possible? You wanted to make it look like an alternate 1960 at least have everything related to technology consistent with it? This is really sloppy writing.