He was replaced by William Demarest , who played his hard - nosed brother ( great ) Uncle Charley part way through the 1964 - 1965 season ( the last on ABC ) .
Frawley continued in the role until a suitable replacement could be found at midseason .
Frawley was replaced by William Demarest , who played Frawley 's hard - nosed brother ( great ) Uncle Charley part way through the 1964 - 1965 season ( the last on ABC ) .
Frawley continued in the role until a suitable replacement could be found at midseason .