Samuel H. Chain

In this MGM Crime Does Not Pay series short, a man and his racketeer buddies devise a scheme to bilk those already seemingly desperate for money of what little they have.

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.