When we first meet Jemima Kirke's character Regan in the twisty Apple TV+ series "City on Fire," she seems an elegantly capable, early 2000s-era New Yorker, the kind of woman who can juggle career, motherhood — and a cataclysmic mystery — with steely resolve. To put it another way, Regan is such a far cry from Kirke's iconic breakthrough role …
