Fitzpatrick's Pub as Pub
Mason confronts J.D. about his past with Cora and they get into a fight.
“Part III” Filming Locations
As Cora's plea hearing approaches, Ambrose uncovers another disturbing piece of her history that changes his perceptions on the case.
The Sinner episode “Part III” was filmed in Congers in the United States of America.
Mt. Pleasant Justice Court as Somerset County Courthouse
Cora returns to court and after some indecision she sees her parents watching and decides to enter a guilty plea.