Roger Ewing

 played jealous boyfriend Marvin Grogan ("Monster") in the first season episode, The Girl Reporter (1964). Bewitched was his first television credit.

Biography
Roger Ewing was born January 12, 1942, in Los Angeles, California. His acting career entailed several guest shots on television shows, sitcoms and movies, but he is best known for his role of a part-time deputy marshal and handy man, Clayton Thaddeus "Thad" Greenwood in thirty-six episodes (1965-1967) of the popular television western series, "Gunsmoke". After he left "Gunsmoke", he played in two movies: as Donald Maxwell in the western "Smith" (1969) starring Glenn Ford, and as Nelson in "Play It as It Lays" (1972) starring Tuesday Weld and Anthony Perkins. He then decided to call it quits for his acting career and pursued his other passion in the field of photography.

He is retired and currently lives in Morro Bay, California, where he is active in local politics.

 Updated March 1, 2020 

Source
Roger Ewing on the Internet Movie Database. Retrieved on February 20, 2020. Updated on March 1, 2020, edited.