Sarah Polley explores her uprooted, twisted family tree

The actress-director was shocked when she found out at age 28 that Michael Polley was not her biological father. She explores the family secret in 'Stories We Tell.'Two days after her 11th birthday, Sarah Polley lost her mother to cancer. The death came as a shock, even though her father and older siblings had watched Diane Polley battle the disease for months. As she grew up in Toronto under the care of her father, Michael, Polley's conception of her mother was fuzzily constructed from memories...