Unseen Guardians
The "unseen guardians" of the title are the Postal Inspection Service, which investigates mail order racketeering; the Underwriters' Laboratories, which are shown testing electrical equipment, fire extinguishers, and large floor safes; and those who run orphanages, who assure that the children in their care are placed in proper adoptive homes.
Genres: Documentary, Drama
Directors: Basil Wrangell
Writers: Doane R. Hoag, George Wallace Sayre, Samuel H. Chain
IMDB: tt0143968