My Three Sons is an American sitcom. The series had a long run, from 1960 through 1972. ABC broadcast the show from 1960 through 1965, and then the series moved to CBS until the end of its run on April 13, 1972. My Three Sons chronicles the life of widower and aeronautical engineer Steven Douglas (Fred MacMurray) as he raises his three sons.
The series originally featured William Frawley (who had first co-starred with Fred MacMurray 25 years earlier in the movie Car 99) as the boys’ live-in maternal grandfather and housekeeper, William Michael Francis “Bub” O’Casey. William Demarest, playing Bub’s brother, “Uncle Charley”, replaced Frawley in 1965 due to Frawley’s illness. In September 1965 (when the show moved from ABC to CBS and when it began being filmed in color), eldest son Mike (Tim Considine) married fiancée Sally Ann Morrison (Meredith MacRae), and his character was written out of the show. To keep the emphasis on “three sons”, original youngest son Chip’s (Stanley Livingston) friend Ernie (Barry Livingston) was adopted.