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.
You can now watch Proof online on the following streaming providers in the United States.
| Directing | John Madden | Director |
| Production | Julie Goldstein | Executive Producer |
| Production | John N. Hart | Producer |
| Production | Robert Kessel | Producer |
| Production | Alison Owen | Producer |
| Production | Jeffrey Sharp | Producer |
| Production | James D. Stern | Executive Producer |
| Production | Bob Weinstein | Executive Producer |
| Production | Harvey Weinstein | Executive Producer |
| Sound | Stephen Warbeck | Original Music Composer |
| Camera | Alwin H. Küchler | Director of Photography |
| Editing | Mick Audsley | Editor |
| Writing | David Auburn | Screenplay |
| Writing | Rebecca Miller | Screenplay |
| Production | Kerry Barden | Casting |
| Production | Billy Hopkins | Casting |
| Production | Suzanne Smith Crowley | Casting |
| Art | Alice Normington | Production Design |
| Art | Keith Slote | Art Direction |
| Art | Barbara Herman-Skelding | Set Decoration |
| Costume & Make-Up | Jill Taylor | Costume Design |
| Costume & Make-Up | Nicola Clarke | Hair Department Head |
| Costume & Make-Up | Rebecca Lafford | Makeup Department Head |
| Costume & Make-Up | Charlotte Sewell | Costume Supervisor |
| Directing | Kim Armitage | Script Supervisor |
| Art | Charmian Adams | Supervising Art Director |
| Art | Bruce Bigg | Property Master |
| Writing | David Auburn | Theatre Play |
| Sound | Mark Auguste | Supervising Sound Editor |
| Sound | Peter Lindsay | Production Sound Mixer |
| Camera | Bill Kaye | Still Photographer |
| Sound | Nyree Pinder | Music Supervisor |
| Sound | Becky Bentham | Music Supervisor |
| Sound | Rebecca Gatrell | Music Supervisor |
| Production | David Pinnington | Location Manager |
| Sound | Chris Baron | Musician |
| Sound | Sam Auguste | Foley Editor |
