This daughter of film director John Farrow and actress Maureen O'Sullivan became an "overnight" star in 1964 when she was tapped to essay the pivotal role of troubled teenager Alison MacKenzie in ABC's groundbreaking primetime serial "Peyton Place". Delicately pretty with blonde hair and blue eyes, Mia Farrow projected an aura of vulnerability, yet was capable of tempering that ethereal quality with a grounding strength (perhaps due in part to surviving a childhood bout with polio). When as a headstrong pre-teen she expressed a desire to follow in her mother's stead, her father sent her to