Guest Stars Elijah O'Sullivan as Jacob Dwyer Conor Mullen as Frank Ahern Carrie Crowley as Mairead Noonan Justine Mitchell as Elaine Lynch Éanna Hardwicke as Joe Ryan Dean Fagan as Finn Ahern Aoibhínn McGinnity as Sgt. Aoife O'Rourke Philip Hill-Pearson as Leon Madi O'Connell as Maria (Receptionist) Anne Bird as Receptionist in Donegal