Almost every falsehood Finch spread — particularly her totally not real bone cancer — wove its way into a story line on Grey’s Anatomy. Photo: Vulture; Photos: ABC, Jennifer Beyer/PEACOCK Grey’s Anatomy has always reveled in big narrative swings and surprising twists, which is one of the reasons it has stayed on the air for 21 seasons and counting. While the ABC series certainly succumbs to certain tropes of the medical drama, it also prides itself on its ability to knock the wind out of