The epitome of the handsome and debonair Hollywood star, actor Robert Wagner – known to friends as “R.J.” – played romantic heroes and upstanding young men in a string of mostly unmemorable 1950s-60s-era features, before finding lasting fame as one of television’s smoothest-of-the-smooth leading men. Wagner brought old-school class to the ABC action-drama “It Takes a Thief” (ABC, 1968-1970) and, more importantly, showed a knack for light comedy with his roles in “Switch” (CBS, 1975-1980) and “Hart to Hart” (ABC, 1979-1984)....