“[Spacey’s scandal] was a ‘gut punch,’ [co-showrunner Frank] Pugliese said, but the prospect of tossing out five months of work and having to rebuild the season without the show’s corrupt central figure actually emboldened him and his partner. ‘It felt so unfair to the story, in a way, we had to defend the world of the show,’ [co-showrunner Melissa James] Gibson said.” Here’s how they pulled it off.