Barbara Walters 'secretly resented' Diane Sawyer, peers say in the new 'Tell Me Everything' documentary. Cynthia McFadden adds that Walters tried to sabotage Sawyer's Katharine Hepburn 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.”