Sarah Greene
Detective Cassandra 'Cassie' Maddox

Killian Scott
Detective Robert 'Rob' Reilly

Peter McDonald
Jonathan Devlin

Leah McNamara
Rosalind Devlin

Conleth Hill
Superintendent O'Kelly

Tom Vaughan-Lawlor
Detective Frank Mackey

Kathy Monahan
Margaret Devlin

Amy Macken
Katharine 'Katy' Devlin / Jessica Devlin

Eugene O'Hare
Detective Quigley

Moe Dunford
Detective Sam O'Neill

Barry O'Connor
Cathal Mills

Sam Keeley
Daniel March

Ian Kenny
Garda Phelan