 His brother Matty (Sebastian de Souza) has strained relationships with his family, engages in criminal behaviour, and lives rough following an altercation with their father.In series six, the group befriend Alex Henley (Sam Jackson), who is gay and in particular forms a close friendship with Liv.Giles Thomas returns as Doug, Roundview's deputy headmaster as does comedian Chris Addison for a second and third year as headmaster David Blood.