 ", then co-starred in "On the Rocks".After "On the Rocks" was canceled in 1976, Stewart portrayed the role of Marvin Decker in the "Bewitched" spin-off series "Tabitha" from 1977 to 1978.In the 1980s, Stewart starred on "Scarecrow and Mrs. King" as section chief Billy Melrose during the show's four-year run from 1983 through 1987, and continued guest starring in both television and films.