Gabriel Byrne
Quirke (3 eps)
Nick Dunning
Malachy Griffin (3 eps)
Brian Gleeson
Sinclair (3 eps)
Aisling Franciosi
Phoebe Griffin (3 eps)
Stanley Townsend
Inspector Hackett (3 eps)
Michael Gambon
Judge Garret Griffin (3 eps)
Frank O'Sullivan
Davy (2 eps)
Sara Stewart
Rose Crawford (2 eps)
Lesa Thurman
Sister Stephanus (1 eps)
Catherine Steadman
Claire Stafford (1 eps)
Janet Moran
Brenda Rutledge (1 eps)
Peter Coonan
Brendan Boyle (1 eps)
Pat Laffan
Costigan (1 eps)
Brid Brennan
Dolly Moran (1 eps)
Gary Egan
Costigan's Man 1 (1 eps)
Andy Kellegher
Costigan's Man 2 (1 eps)
Shane Taylor
Andy Stafford (1 eps)
Deirdre Donnelly
Sister Dominic (1 eps)
Jane McGrath
Maisie (1 eps)
Donald Sumpter
Josh Crawford (1 eps)
Diarmaid Murtagh
McCoy (1 eps)
Tim Dillard
Trucker (1 eps)
Garrett Lombard
Father Harkins (1 eps)
Anne Gill
Deirdre (1 eps)
Aoibhinn McGinnity
Delia (1 eps)
Charlie Murphy
Deirdre Hunt (1 eps)
Donna Dent
Mrs. Cuffe-Wilkes (1 eps)
Branwell Donaghey
Billy Hunt (1 eps)
Lee Ingleby
Leslie White (1 eps)
David Murray
John Millican (1 eps)
Aaron Neil
Hakim Kreutz (1 eps)
Áine Ní Mhuirí
Maggie (1 eps)
Paul McGlinchey
Customs Officer (1 eps)
Lalor Roddy
Old Man (1 eps)
Sam McGovern
Young Garda (1 eps)
Denis Conway
Father Anselm (1 eps)
Colin Morgan
Jimmy Minor (1 eps)
Obi Abili
Patrick Ojukwu (1 eps)
Flora Montgomery
Isabel Galloway (1 eps)
Aidan McArdle
Oscar Latimer (1 eps)
Dearbhla Molloy
Celia Latimer (1 eps)
Ian McElhinney
Bill Latimer (1 eps)
Bernadette McKenna
Margaret (1 eps)
Donagh Deeney
Barman (1 eps)
Barbara Adair
Mrs. Leetch (1 eps)
Noni Stapleton
Ward Sister (1 eps)
Gerard Adlum
Garda Dermot (1 eps)
Chris Newman
Rugby Fan (1 eps)
