Guest Stars Michael D'Arcy as Adam Niall Jordan as Peter Savage Ellie O'Halloran as Jamie Rowan David Thomas as Young Cathal Daniel Brickenden as Young Jonathan Aoife Fitzpatrick as Young Sandra Eunice McMenamin as Alicia Rowan Marcus Lamb as Terence Andrews Caoimhe O'Malley as Heather Iseult Murphy as Little Lexie Dawn Bradfield as Cepta Maddox Peter Coonan as John Naylor Adam Devereux as Brady Robyn Dempsey as Holly Mackey