Mark's mum explains how she got advice about Mark's drug use.
Mark and his family describe how his cannabis use changed their relationship.
Mark explains how cannabis led to him taking other drugs before he was expelled.
Mark describes his life and his family describe how they feel about him and his drug use.
Conflicts between Sarah's old and new lives are starting to affect her.
Sarah is drawn into drug dealing. Here she has an altercation with a rival drug dealer.
Link is bullied by his mother's partner so he decides to leave home.
Link leaves home when he is bullied by his mother's partner and ends up homeless.
Link is assaulted as he spends his first night on the streets.