Samuel H. Chain

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.

Highlights a new system that will enable doctors to operate over long distances.

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.

This John Nesbitt's Passing Parade short tells the story of John Peter Zenger, who in Colonial New York was tried for sedition based on what he printed in his newspaper.