Long careers are rarer than they look, and Paul Kent has become a familiar face whose name has been turning up in credits for decades. 'Star Trek II: The Wrath of Khan' is the most-watched work of the career, as Beach. 'A Nightmare on Elm Street 3: Dream Warriors' is close behind in visibility. If the filmography has a home genre, it is thriller. Steady employment, rather than one breakout, gives the career its shape.