Part III (Season 1)

"Part III" is the third episode of the first season of The Sinner. It is the third episode of the series overall. It premiered on August 16, 2017. It was written by Derek Simonds and directed by Antonio Campos.

Synopsis
Cora begs Mason to bring Laine for a visit. As new information emerges, Ambrose's investigation takes a surprising turn.

Cast

 * Bill Pullman as Detective Harry Ambrose
 * Jessica Biel as Cora Tannetti
 * Christopher Abbott as Mason Tannetti
 * Dohn Norwood as Detective Dan Leroy
 * Abby Miller as Sergeant Caitlin Sullivan