Catherine is a woman in her late twenties who is strongly devoted to her father, Robert, a brilliant and well-known mathematician whose grip on reality is beginning to slip away. As Robert descends into madness, Catherine begins to wonder if she may have inherited her father's mental illness along with his mathematical genius.

Gwyneth Paltrow

Catherine Llewellyn

Anthony Hopkins

Robert Llewellyn

Jake Gyllenhaal

Harold 'Hal' Dobbs

Hope Davis

Claire Llewellyn

Danny McCarthy

Cop

Tobiasz Daszkiewicz

Limo Driver

Gary Houston

Professor Barrow

Leigh Zimmerman

Friend at Party

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