Jason Fraley interviews Otis Williams, last surviving original member of The Temptations, which performs live at “A Capitol Fourth” in Washington D.C. tomorrow at 8 p.m. on PBS. They discuss classic Motown hits like “My Girl,” “The Way You Do the Things You Do,” “Get Ready” and “Ain’t Too Proud to Beg,” as well as evolving into a new era with “Cloud Nine,” “Ball of Confusion,” “Just My Imagination” and “Papa Was a Rolling Stone.”  (Theme Music: Scott Buckley's "Clarion")