While some may be overly critical of this show by comparing it to the classic 1965 movie, I think this show can stand on its own. I loved the "vintage" cinematic look they achieved. They could have done something atrocious as many remakes do, of "re-imagining" to the modern era (and they certainly could have--the cold war is back). As this show sets out to be a very different animal than the earlier classic, there's no need to compare.
The story moves quickly and smoothly, though it meanders a bit in the middle episodes to establish a second arc. But very little is wasted; no unnecessary side arcs, no eyerolling overtures to politically correctness or woke agenda. It stays laser-focused on telling the story.
The acting is very good if not excellent. Cole doesn't fit the stereotype British agent, but he makes it work, though he deadpans most scenes. Boynton is well cast as a beautiful but cold and bitter agent who warms up to Palmer in a believable way, and really carries the show. Hollander gives an excellent performance, as well, as a pragmatic veteran spook who finds himself trapped by his past.
I'm not sure if they will fabricate a second series, but this first one can stand alone very nicely.