The Better Sister tells two stories about two different sets of siblings, one fictional, one real. Officially, the Prime Video series (premiering May 29) is an adaptation of the 2019 novel by Alafair Burke, about a pair of estranged siblings, played by Jessica Biel and Elizabeth Banks, reuniting when one’s husband is murdered. But it’s also a way for the show’s creator, Olivia Milch, to work through the family dynamics with her own sister, Elizabeth Milch (who’s also a Better Sister producer), and their dad David Milch, the brilliant but troubled mind behind all-time classic dramas Deadwood and NYPD Blue.
In the story, the father of Biel’s Chloe and Banks’…