RIP Ken Kercheval

Ken Kercheval, who played JR Ewing's arch rival Cliff Barnes, has died.  On the show, Cliff was the brother of Pam, who married JR's brother, Bobby.  In spite of that, Cliff hated the Ewings, especially, Jr.
Cliff was  outmatched by JR, who was smooth as he was dastardly.  Cliff, on the other hand, was principally clumsy and gullible.  

Larry Hagman and Ken Kercheval were the only actors who stayed through the entire run of the series. 

A heavy smoker, Kercheval was 83.