The SinnerSeries 1Episode 3BBC Four Duration: 40 minutesFirst broadcast: Sat 8th Dec 2018, 21:00 on BBC FourLatest broadcast: Mon 14th Oct 2019, 00:00 on BBC Four HDWhen Ambrose discovers Cora's secret, it alters the entire course of the investigation. Mason follows his own lead, unaware of the truth.ContributorsCora Tannetti:Jessica BielHarry Ambrose:Bill PullmanMason Tannetti:Christopher AbbottDan Leroy:Dohn NorwoodCaitlin Sullivan:Abby MillerFay Ambrose:Kathryn ErbeJ.D.:Jacob PittsMargaret Lacey:Rebecca WisockyElizabeth Lacey:Enid GrahamWilliam:C J WilsonWriter:Derek SimondsDirector:Antonio CamposGenresDramaCrimeBrandThe SinnerSeriesThe Sinner: Series 1 Source: BBC Online