Chris O'Dowd Jack E McCarthy Creator, Actor, Director, Executive Producer Christina Hendricks Wendy Patterson Actor, Executive Producer Paddy Considine Séamus Proctor Actor David Wilmot Keith McCurdle Actor Andrew Bennett Barry Battles Actor Michele Forbes Barbara the Butcher Actor David Rawle Sonny Proctor Actor Patrick Martins Jules O'Brien Actor Ruth McCabe Betty Battles Actor Peter McGann Matt Magee Actor Sam C. Wilson Big Jim McDaid Actor Jamie Michie Pubba McGoldrick Actor Mariana Aparicio Astrid in Amsterdam Actor Chris McCurry Dalston Derek Actor Maria Cunningham School Clíona Actor Cillian Lenaghan Teen Séamus Actor Maeve Higgins Health Service Employee 1 Actor, Writer Bethan Mary James Health Service Employee 2 Actor Frankie McCafferty Patient Rory Actor Rónán Ó Snodaigh Oldgrange Nick Actor Liz Gill Producer Colin Callender Executive Producer Scott Huff Executive Producer Glen Basner Executive Producer Milan Popelka Executive Producer Stefanie Berk Executive Producer Alex Moody Executive Producer Robert O'Connor Film Editor Michael Ahern Director Enda Loughman Director