Cynthia McFadden said Walters was "dogged by Diane's very existence," and revealed in a new film that Walters "put a lot of pressure on Kate to unbook" a Sawyer interview.

Jackie Jesko also talks to THR about her and the producers' "careful" approach to discussing motherhood and what surprised her most about Walters' life during her research.

I think with someone like Barbara, people know that she was a difficult person and a complicated person, and it would be ridiculous to make something about her that didn’t include that.”