It’s hard for TV shows to really make enough noise to get noticed in this era of Peak TV. And then, if they do, harder still to sustain what made them so exciting and different to begin with. Some take breaks, some go through sophomore slumps, but here BBC America’s fantastic, twisted drama Killing Eve is, returning almost exactly one year later just as sharp and engrossing as before. The series’ key dynamic remains the same, but writer Emerald Fennell — who has taken over from creator and EP Phoebe Waller-Bridge — has placed Eve (Sandra Oh) and Villanelle (…