My Three Sons was an American situation comedy that follows the life of widowed aeoronautical engineer Steve Douglas (Fred MacMurray) and his three sons namely Mike (Tim Considine), Robbie (Don Grady) and Chip (Stanley Livingston). In the later seasons, the eldest son Mike moved to California after marrying his childhood sweetheat Sally (Meredith MacRae) and Steve adopted Chip's friend Ernie (Barry Livingston). Always there to help steve with the family is Bub O'Casey (William Frawley), and later by Charlie O'Casie (William Demarest), both maternal grandfather of the boys.