Continuity mistake: The final two episodes of this series are filmed in east Germany and are set in July. The snow on the ground comes and goes between scenes, plus why is it snowing in July?
Continuity mistake: When Arnie and Sam are following "animal man"'s blue van on their bikes down the busy road the vehicles on the road around the van change between shots.
Visible crew/equipment: When Mrs Keele drives her car at the racist political campaigner outside the school you can a reflection of the boom mike in the window of her car.
Continuity mistake: When Arnie is outside "Animal man's" flat on his bike there is another boy on a bike riding to his right. The angle changes to the entrance to the flats then back to Arnie, and the boy on the bike has disappeared.
Visible crew/equipment: Martha Jordan enters the room when Mr Robson is interviewing Brian about the assault on Jessica. As Brian leaves the room she walks towards Robson and a shadow of the camera and a sound man holding a boom mike can be seen on her green jacket.
Factual error: Justine and Maria are in Justine's bedroom. Justine is showing Maria the photos on her bedroom wall of her family and school friends. There is a photo of Banksie and Zammo on the wall. These two boys left Grange Hill at the end of series 10. Justine started in series 11, so she would not have known them.