Guest Stars Michael D'Arcy as Adam Niall Jordan as Peter Savage Ellie O'Halloran as Jamie Rowan Amy Macken as Jessica Devlin Barry O'Connor as Cathal Mills Niall O'Brien as Young Shane David Thomas as Young Cathal Daniel Brickenden as Young Jonathan Aoife Fitzpatrick as Young Sandra Paul Roe as Vincent Johnstone Elena Murphy as Little Cassie Iseult Murphy as Little Lexie Dawn Bradfield as Cepta Maddox Ed Murphy as Cassie's Dad Jessica Leen as Cassie's Mum