This paper presents results of two longitudinal case studies on the transferability of the DLG to prisons. The first is a long term study of a DLG in a prison at the north of Spain from 2001 to 2012. The second longitudinal case is a study of a group of a DLG in a women’s prison at the northeast of Spain, from which data has been gathered among others through daily life stories since 2012. The analysis of the data highlighted that DLG had an impact on the self-concept of the participants and in their relationships with their families while they were inside the prison. Among these, one of the aspects emphasized by many of the participants interviewed is the improvement of the relationships with their school-age children (Flecha, García-Carrión and Gómez, 2013). The dialogues and discussions in the DLG help them to change their communication and discourse with their family over the telephone calls, in the visits to the centre or on parole. A curiosity and desire awakens among the prisoners to bring that knowledge to their families. After leaving the prison, they recognized the extremely value of participating in the DLG as pathways to their social inclusion.