Guest Stars Dominic MacHale as Sergeant Healy Shane Casey as Billy Murphy Ciaran Bermingham as Superintendent Flynn Michael Sands as Jock's Dad Cora Fenton as Jock's Mam Pascal Scott as Farmer Stephen O'Connor as Angry Dad P.J. Gallagher as Ray the Drug Dealer Tommy Harris as Big Mouth Antoinette Hilliard as Fish Head Woman Fionula Linehan as DIY Cashier Wesley O'Duinn as Fish Man