Nearly a decade in the making, The House We Lived In is a strikingly candid portrait of a family transformed by a father’s brain injury. In 2011, 61-year-old Tod O’Donnell awoke from a coma with a case of total amnesia that doctors assured his wife and children was temporary. But when it proved permanent, and for no discernible reason, the O’Donnell’s were left to themselves to untangle the mystery — a struggle for answers that would only raise more questions as they came to realize, painfully, that the real mystery was Tod himself.

• Documentary