The Changes isn't an unjustly-forgotten gem. It has an interesting ending which feels very much part of the British fantasy and science fiction canon of the mid-century, but the show doesn't build to a finale so much as stumbles into it.
There's so much purposeless walking around that it's difficult not to draw the conclusion that the decision to find 250 minutes of material for this show was made by someone who wasn't working in production. Not a great deal happens in the first five episodes. Mostly people ask each other questions, repeat the answers back at them, walk around a bit more, have the same conversation again. Nothing is particularly exciting and little is particularly detailed. The Changes is very much of its time in terms of its tone and look, but there are plenty of other BBC productions which offer those pleasures and a great deal more. After setting that initial, techno-phobic premise in the first five minutes the series does far too little to engage with its ramifications in an way other than "people are scared of change". From its frankly revolting bongo-and-synthesiser theme tune to the glacial pacing and woolly plotting make The Changes a surprisingly tedious watch.