This is a review of Counterpart, a TV series that premiered on Starz in late 2017 and was broadcast for two seasons. It’s available on Amazon Prime now. While I am not going to spoil specific plot points, I will ruin a few surprises and cover the general direction of the series. Proceed at your own risk if you haven’t seen it. Better yet, go see it! The best science fiction is about how people, society, and cultures, react to fictional science.