<P> Ewing is best remembered for his characterization of part - time deputy marshal Clayton Thaddeus `` Thad '' Greenwood in thirty - six episodes ( October 2 , 1965 - September 25 , 1967 ) of the long - running CBS western television series Gunsmoke with James Arness . </P>
<P> Ewing is best remembered for his characterization of part - time deputy marshal Clayton Thaddeus `` Thad '' Greenwood in thirty - six episodes ( October 2 , 1965 - September 25 , 1967 ) of the long - running CBS western television series Gunsmoke with James Arness . </P>
who played the role of thad on gunsmoke
who played the role of thad on gunsmoke
Ewing
Ewing