This chapter discusses psychodrama to sociometry. The psychodramatic method uses mainly five instruments the stage, the subject or actor, the director, the staff of therapeutic aides or auxiliary egos, and the audience. Reality and fantasy are not in conflict, but both are functions within a wider sphere the psychodramatic world of objects, persons, and events. Delusions and hallucinations are given flesh and an equality of status with normal sensory perceptions. The architectural design of the stage is made in accord with operational requirements. The locus of a psychodrama, if necessary, may be designated anywhere, wherever the subjects are, the field of battle, the classroom, or the private home, but the ultimate resolution of deep mental conflicts requires an objective setting, the psychodramatic theatre. The psychodramatic approach deals with personal problems principally and aims at personal catharsis; the sociodramatic approach deals with social problems and aims at social catharsis.