I really enjoyed
The Ipcress File. The 6 episode season is set in 1963 West Berlin and England, based on the 1965 movie, which was what I was originally looking for. IMO, really well done with the 1963 setting- clothes, cars, etc. The two leads are excellent (new to me), as well as the rest of the cast. Feels like a classic '60s spy thriller. The lead girl "Jean," played by Lucy Boynton is a knockout.