Rose Byrne and Meghann Fahy Play Estranged Sisters in Peacock's The Good Daughter

Rose Byrne and Meghann Fahy play estranged sisters in The Good Daughter, a six-episode series now streaming on Peacock. The show is built around two women who have drifted apart, and the story keeps returning to what that distance has cost them.

Karin Slaughter adapted the series from her own bestselling novel of the same name. Byrne plays Sam Quinn, who built a career in patent law in New York City. Patent law covers the legal protection of inventions. Fahy plays her sister, Charlie Quinn, who practises criminal defence law in the fictional hometown of Pikeville. A criminal defence lawyer represents people accused of crimes.

Their parents are played by two well-known actors. Olivia Williams plays Gamma, the mother of Sam and Charlie, and Brendan Gleeson plays Rusty, their father. Paula Malcomson plays Judith, the teacher who looked after Charlie after Gamma's death. Michael Dorman plays Ben.

The Pikeville storyline centres on Kelly Wilson, a pregnant teenager who allegedly confessed to killing her principal and a younger student. Shayna Benardo plays Kelly. Kovar McClure plays the principal, Douglas Pinkman. The allegation is the claim made in the series, and nothing about it has been tested in court outside the drama.

Variety's spoiler guide to the season finale, published on 14 November 2026, sets out the cast and characters in detail.

For viewers, the appeal of a short run is simple. At six episodes, the whole series can be watched over a few evenings, and the two sisters' separate lives are laid out from the first episode. The show asks its audience to keep track of two households, two careers and one family history, all in one place.