Sarah GreeneDetective Cassandra 'Cassie' Maddox Killian ScottDetective Sgt. Robert 'Rob' Reilly Peter McDonaldJonathan Devlin Leah McNamaraRosalind Devlin Conleth HillSuperintendent O'Kelly Tom Vaughan-LawlorDetective Frank Mackey Kathy MonahanMargaret Devlin Amy MackenKatharine 'Katy' Devlin / Jessica Devlin Eugene O'HareDetective Quigley Moe DunfordDetective Sam O'Neill Barry O'ConnorCathal Mills Baz BlackTattoo Artist (uncredited) Derek CarrollCameraman (1.1) (uncredited) Emer O'SheaProduction Executive 
