Guest Stars Seamus O'Hara as Mackers (Belfast Project) Judith Roddy as Jean McConville Stuart Graham as Albert Price Co Starring Emily Healy as Helen McConville Rylee Neilly Large as Michael McConville Matthew Murphy as Billy McConville Conor Trainor as Jim McConville Lennox Loughran as Tucker McConville Ava-Rose Gallagher as Agnes McConville Isaac Heslip as Archie McConville Frank Blake as Seamus Wright Keith McErlean as Seamus McKendry Michael Condron as Deckie Aoife Conlon as Young Dolours Tony Devlin as Older Jimmy Gerard Jordan as Frank Eoin Lynch as Reporter Paul Mallon as Older Michael McConville Dáithí Ó Haragáin as Danny Frank Laverty as Marty Leonard Buckley as Brian Paddy Towers as Kevin McKee Maisie Squibb as Young Marian Ian McElhinney as Father Reid Ryan Hayes as Older Tucker McConville Natalie Radmall-Quirke as Older Agnes McConville Aoife O'Sullivan as Intern Kyle Hixon as Older Jim McConville Christopher Dunne as Gravedigger Ged Forrest as Hardliner Two Andrew Steele as Sinn Fein One Maurice Bryne as Coroner Gerard McCabe as Older Archie McConville Peter Collis as Man with Dog Fintan Shevlin as Older Billy McConville Tebby Fisher as White House Aide Marty Breen as Pharmacy Clerk Steve Gunn as Sinn Fein Two Harry Burton as Engineer Killian Donnelly as Radio Host Edmund Dehn as Old Man Danielle Magennis as Older Susie McConville Rory Mullen as Hardliner One Richard McFerran as Detective Lorna Lowe as Immigration Officer