Dialectical Behaviour Therapy (DBT) is a type of “talking therapy”, developed from cognitive behavioural therapy; it has been adapted to help people who experience emotions, often females diagnosed with Borderline Personality Disorder (BPD). With its growth in popularity, DBT has been adapted and used with other populations - not just adult females with BPD – to include forensic populations (i.e. people who are in contact with services due to criminal behaviour) and adolescent populations. This thesis contains a systematic literature review investigating the use of DBT in Forensic Services and an empirical study that utilised a qualitative design to explore adolescents and parents’ experiences of DBT.