Guest Stars Sam Bottomley as Ralph Roberts Oscar Kennedy as Young Liam Aqib Khan as Adnan "Addy" Masood Shaun Thomas as Tom "Craggy" Cragg Rosie Cavaliero as Linda (Liam's Mum) Steve Pemberton as The Gardener Emma Beattie as Cambridge Interviewer Joel Phillimore as Marcus Jemma Churchill as Mrs Peacock Andrew Turner as Fake Librarian Don Gallagher as School Interviewer Gareth Kane as Solar Panels Customer Olivia Jerdin as Kara
