It’s been nearly 26 years since Proof, David Auburn’s Pulitzer Prize and Tony winning play opened on Broadway. The playwright said in a recent interview that he was in no rush to revive the celebrated work following the bravura production in 2000 starring Mary Louise Parker and Larry Bryggman, but once he saw a reading with Ayo Adebiri and Don Cheadle he was sold. And so will everyone else who comes to see this stunning revival. It is as elegant and exquisitely compact as the mathematical proof at the center of the story.
Don’t let the math reference scare you. This is not a play about numbers, but what Auburn has been able to do with just four characters is pretty astonishing. This little drama with a good share of humor resonates in the most universal way. It’s hard to imagine anyone not being able to relate to the characters. There are no villains here. Each of them is decent and well-intentioned yet forced to deal with obstacles that challenge their lives in the most profound way. And it’s the way that Auburn constructs their interactions and relationships that turns Proof into a foolproof classic.
Of course it helps to have a production team sharing the same vision. This one achieves symmetry with the show’s protagonists who liken their best math theorems to music. Directed by Thomas Kail, it all comes together with a lyrical grace.
[Read Steven Suskin’s ★★★★★ review here.]
The narrative focuses on Catherine (Ayo Adebiri), a bright young woman living with her renowned father, Robert (Don Cheadle), a professor at the University of Chicago famed for his mathematical genius. Catherine’s life is upended when her dad starts to lose his mind. She makes the difficult decision to drop out of college and care for him. She is devoted, but along with his high IQ, she fears that she may also have inherited his descent into madness.
She’s further conflicted when a former student, Hal (Jin Ha), shows up to go through Robert’s personal papers in the hopes of discovering some last bits of brilliance in the professor’s declining years. Catherine regards Hal as an annoyance until they both discover a mutual attraction.
The end of Act 1 features another major discovery. There will be no spoilers here but let it be said that the final three words you hear before intermission is one of the most startling first act closing lines ever uttered on the dramatic stage. It elicited gasps from the audience as the lights went to black.
That new tangent in the storyline sets up a mystery which gives the play some real suspense in Act 2. It puts Catherine in a more emotionally vulnerable position; and complicating matters even further – the arrival of her older sister, Claire (Kara Young). The sisters don’t get along but Claire suspects that Catherine’s depressive behavior is a sign that, like their father, Catherine may indeed be dealing with mental illness. Claire plans to sell the house and insists that Catherine move to New York with her.
Casting actors of color gives the production an added dimension that provides a fresh new perspective on the narrative. There’s now a racial element that sets Robert apart as a black scholar in the mostly white academic community. And as a black woman attempting to make her mark in a male dominated science, Catherine faces even more hurdles. Sexism is another dynamic as both Claire and Hal doubt that Catherine could possibly match her father’s superior intellect.
Cheadle, making his Broadway debut, has the smallest role of the four but his presence is large and his genuine warmth and good humor infuse the show with a naturalism that makes his mental collapse all the more poignant. In the throes of his illness, he tells Catherine that the machinery (his mind) is working again and he’s come up with a proof that he wants to share. She hesitates but on his insistence, she reads: “Let X equal the cold. It is cold in December. The months of cold equal November through February. There are four months of cold, and four of heat…” It’s gibberish and the scene ends with that shattering revelation.
Kara Young, who won the Tony last year in Purpose, is wonderful here. As the less favored but more responsible sibling, she is the water to Catherine’s oil. They’re constantly fighting, but blood is thicker and they’re stuck with one another despite all the hostility. It’s a very realistic portrayal of mismatched siblings.
Catherine is a difficult role to play. Navigating her father’s illness while trying to pursue her own goals in his shadow is perpetually frustrating for her, and she is reticent much of the time. Edebiri, best known for starring in the FX series The Bear, is making a compelling Broadway debut. She invests Catherine with just enough armor to shield her self-doubts. Only when she’s with her father does she lower her guard; and those scenes are especially moving. When Hal comes along there is an obvious attraction but not enough for her to reveal too much of herself.
Jin Ha’s Hal makes us believe that they might have a future. And he convincingly proves that even math geeks can be hot.
Kudos to the technical team beginning with scenic designer Teresa L. Williams’ lovely semi-realistic back porch, rimmed with lights that outline the architectural frames. Amanda Zieve’s lighting softens the overall tone and Dede Ayite’s costumes capture everyone’s personalities to a T. Special mention to Kris Bowers’ music which sets the perfect mood.
All of the scenes in the play are so dramatically complete, they could almost stand on their own…and after each one concludes, the audience is moved to applaud. That doesn’t happen very often and it’s proof of the play’s virtuosity. It all adds up to one exceptional piece of theater.
Proof opened April 16, 2026, at the Booth Theatre and runs through July 19. Tickets and information: proofbroadway.com
