Multisystemic Therapy, wraparound and the link worker model target people with multiple and complex needs, who are often poorly served by mainstream services. Key outcomes addressed by these models include reducing reoffending and improving mental health. They illustrate the importance of a holistic, personalised approach which prevents crisis situations. The evidence is promising that these models work, although the quality of the evidence base varies between the models. The wraparound and link worker models in particular would benefit from further research and evaluation. All three models, if implemented faithfully, have potential to save money through reduced demand on the emergency services, the criminal justice system and the care system.