Director Sarah Polley in "Stories We Tell." (Roadside Attractions)

Director Sarah Polley in "Stories We Tell." (Roadside Attractions) Credit: Director Sarah Polley in "Stories We Tell." (Roadside Attractions)

“Back to the Future” tapped into one of life’s great mysteries when Marty McFly went back in time and met his parents’ younger selves.

We’ve all wondered about the people who made us; who were they, once? What do their life stories say about ours?

Sarah Polley’s new documentary, “Stories We Tell,” which hits theaters on Friday, is centered on an earth-shattering revelation.

The acclaimed actress (“Dawn of the Dead,” “The Sweet Hereafter”) and writer/director (“Take This Waltz,” “Away From Her”) learned several years ago that the man she grew up believing to be her biological father wasn’t, and that her late mother had an affair with her real dad.

Amassing Super-8 re-enactments and featuring a wealth of different perspectives in the form of narration and on-camera interviews, Polley offers a brave, thoughtful look at the different ways the principal players in this seminal event and those affected some 30 years later remember and cope with it.

amNewYork spoke with Polley.

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