Guest Stars Carrie Crowley as Mairead Noonan Elijah O'Sullivan as Jacob Dwyer Conor Mullen as Frank Ahern Justine Mitchell as Elaine Lynch Éanna Hardwicke as Joe Ryan James O'Donoghue as Calum Dwyer Dean Fagan as Finn Ahern Aoibhínn McGinnity as Sgt. Aoife O'Rourke Síle Fitzgerald as Baby Nell Philip Hill-Pearson as Leon Clare Calbraith as Cheryl Aideen Wylde as Registrar