Proof

“The biggest risk in life is not taking one.”

Catherine Llewellyn (Gwyneth Paltrow) is in her late twenties and has spent years caring for her father, Robert (Anthony Hopkins), a celebrated mathematician whose mind is coming apart. As he slips further from reality, she starts to wonder whether his illness is a trait she has inherited along with his gift for numbers. John Madden adapts David Auburn's play and keeps the camera close, so the house feels like a place Catherine cannot leave.