Guest Stars Carrie Crowley as Mairead Noonan Conor Mullen as Frank Ahern Justine Mitchell as Elaine Lynch Elijah O'Sullivan as Jacob Dwyer Éanna Hardwicke as Joe Ryan James O'Donoghue as Calum Dwyer Hazel Doupe as Ingrid Jensen Dean Fagan as Finn Ahern Ayoola Smart as Cathy Cregan Hilary Rose as Alanna Hutchins Hugh O'Conor as Dr. Kevin Ayana Welby as Baby Noah Barry Barnes as Tommy Hehir Mary O'Driscoll as Mrs. Kennedy