Sarah Phelps Creator, Executive Producer, Writer Sarah Greene Cassie Maddox Actor Killian Scott Rob Reilly Actor Antonio Aakeel Rafe Lahiri Actor Carolyn Bracken Sandra Sculley Actor Moe Dunford Sam O'Neill Actor Vanessa Emme Abby Stone Actor Sam Keeley Daniel March Actor Charlie Kelly Justin Mannering Actor Ian Kenny Phelan Actor Eugene O'Hare Detective Quigley Actor Ericka Roe Alannah Shorey Actor Conleth Hill O'Kelly Actor Tom Vaughan-Lawlor Frank Actor Alan Gasmer Executive Producer Ed Guiney Executive Producer Elizabeth Kilgarriff Executive Producer Kate Harwood Executive Producer Noemi Spanos Executive Producer Peter Jaysen Executive Producer Saul Dibb Executive Producer Carmel Maloney Producer Tana French Writer John Hayes Director