On “Two American Families,” the latest from “Frontline,” Bill Moyers tells the story of two families in Milwaukee struggling to avoid sliding into poverty. The program raises provocative questions about the changing nature of the U.S. economy and the fate of a declining middle class. 10  p.m., PBS.

A new season of “Storage Wars New York” kicks off with an episode that has the buyers heading to Trenton, N.J. Chris and Tad find some fireworks there, but wind up getting no bang for their buck. 9  p.m., A&E.