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
as Catherine Llewellyn
Anthony Hopkins
as Robert Llewellyn
Jake Gyllenhaal
as Harold 'Hal' Dobbs
Hope Davis
as Claire Llewellyn
Danny McCarthy
as Cop
Tobiasz Daszkiewicz
as Limo Driver
Gary Houston
as Professor Barrow
Leigh Zimmerman
as Friend at Party
Colin Stinton
as Theoretical Physicist
Leland Burnett
as Band Vocalist
John Keefe
as University Friend
Chipo Chung
as University Friend
