Sex offenders are among the most reviled people in our society; their crimes evoking powerful responses from communities and the media. But over 33,000 people on the Sex Offenders Register do live in our midst, and with loneliness and social isolation contributing to recidivism, how can the risk of re-offending be reduced ? In a special programme, Claudia Hammond talks to former prisoners about their crimes and meets the volunteers in Circles of Support and Accountability, who choose to meet, befriend and support these people, in order to help them rehabilitate and reintegrate back into society. Producer: Fiona Hill.