This clinical study describes a pilot experience of Multi-Family Treatment Groups (MFTG) as a treatment modality. The group leaders were two family therapists. Three intact families with completely different life styles, all chronically malfunctioning, and with previously unsuccessful treatment were chosen at random from the Clinic intake. The most striking feature of this group was each member's total isolation, both within the family unit and outside. The expectation in placing these very sick families in an MFTG was to crystallize within the group process the inherent pathology contained in each family system, thereby helping individuals and/or families to move towards appropriate, motivated treatment. Not only were initial goals realized with most of the group members, but an important further social dimension became apparent. As a direct result of the group experience, color, cultural and age boundaries were crossed, allowing the common humanity in each individual to emerge. As the social isolation broke down, concurrently so did the individual isolation. This paper discusses the validity of MFTG Groups as a treatment modality for isolated families as a social as well as a clinically dynamic intervention -- one which has the potential to combine improved emotional as well as social functioning. (Author)