Guest Stars Oscar Kennedy as Young Liam Sam Bottomley as Ralph Roberts Aqib Khan as Adnan "Addy" Masood Shaun Thomas as Tom "Craggy" Cragg Nick Preston as Rupert Emily Coates as Rachel Fielder Lily Frazer as Jess James Dryden as Mr Dreyfus Tilly Steele as Katie Celeste Dring as Penelope Sue Vincent as Session Leader