A filmed half-hour detective series, nine episodes of which were originally produced in 1949 by CBS but never aired on that network. DuMont bought the films and produced four more episodes in 1952. Each week New York Private Investigator Eddie Drake (Don Haggerty) relates one of his adventures to Dr. Karen Gayle, (Patricia Morrison), a lady Psychiatrist who is compiling a Volume on Criminal Psychology. In the final 4 episodes filmed in 1952, Patrcia Morison was replaced by actress Lynne Roberts portraying Dr Joan Wright as the Criminologist.