Gwyneth Paltrow gives a career performance in the powerful character drama Proof. In the wake of her father’s death after a prolonged struggle with Alzheimer’s disease Catherine starts to question her own sanity, which gets exacerbated when her father’s former grad student discovers a mathematical proof that she claims to have written but looks like her father’s work. Accompanying Paltrow are Anthony Hopkins and Jake Gyllenhaal, who both deliver extraordinary performances. But it’s Paltrow’s outstanding work that carries the film, as she gives a brilliant introspective look into the mind of Catherine as she struggles to find the truth and come to terms with her fears. Yet some credit needs to go to director John Madden, who does an incredible job at drawing the audience into Catherine’s struggle, and keeps the question of her mental illness and the authorship the proof constantly in question. Proof is an exceptionally well-crafted and transcendent film that deals with some provocative and controversial issues.