Based on the 2005 Documentary of the Same Name, “The Staircase” excels until the final episode.
“The Staircase” is based on Jean-Xavier de Lestrade’s eight-part documentary series, which was shown on the Sundance Channel in 2005. Antonio Campos’ eight-part limited series for HBOMax also focuses on the death of Kathleen Peterson and the trial of her husband, Michael Peterson, for first-degree murder in 2002.
During Michael’s trial, Oscar-winning documentary filmmaker de Lestrade was given unprecedented access to Michael, his family, and the courtroom. Campos, who directed Rebecca Hall to profound effect in the underrated and underseen “Christine,” now adds his vision to this extraordinarily complex story.
The Petersons lived what looked like an ideal existence in Durham, North Carolina. To other people, they seemed like the perfect family. And Campos has assembled an excellent cast for every family member as follows:


THE PETERSONS (MICHAEL and KATHLEEN)
Colin Firth (Michael Peterson, a compulsive liar. He is an author and an occasional political candidate. He is constantly supported by his second wife, Kathleen).
Toni Collette (Kathleen Peterson, Michael’s second wife. She is an executive at Nortel and the family’s breadwinner. This is also her second marriage. She dies after falling down a flight of stairs in the family home. Did she trip, or did Michael push her?

MICHAEL AND KATHLEEN'S CHILDREN
Dane DeHaan
Clayton Peterson is Michael’s older son from his first marriage. He has had numerous run-ins with the law and spent time in prison. He is married with a baby on the way. He supports his father during the trial.
Patrick Schwarzenegger
During the trial, Todd Peterson (Michael’s younger son from his first marriage) supports his father.
Sophie Turner
(Margaret Peterson, Michael’s older daughter, was adopted by Michael and his first wife in Germany after Margaret’s parents, American ex-pats, and Peterson’s best friends both died). The father in South America had an illness, and the mother in Germany had what was deemed, at the time, a brain hemorrhage after she fell down a flight of stairs in a manner almost identical to Kathleen’s. The last person to see her alive was Michael! She supports her father during the trial.
Odessa Young
Martha Peterson, Michael’s younger daughter and Margaret’s sister, was adopted by Michael and his first wife in Germany. She is beginning to explore her queer identity. She supports her father during the trial.
Olivia DeJonge
Caitlin Peterson (Kathleen’s daughter from her first marriage) initially supports her stepfather but then turns against him and sides with the prosecution during the trial.

MICHAEL’S BROTHER BILL AND HIS EX-WIFE PATRICIA.
Tim Guinee (Bill Peterson, Michael’s brother) supports Michael during the trial.
Trini Alvarado (Patricia Sue Peterson, Michael’s first wife and mother to Todd and Clayton. She supported her former husband during the trial.

KATHLEEN’S SISTERS CANDALE AND LORI
Rosemarie DeWitt (Candace Hunt Zamperini, Kathleen’s sister. She sides with the prosecution during the trial.
Maria Dizzia (Lori Campbell, Kathleen, and Candace’s sister. She sides with the prosecution during the trial.

THE FRENCH DOCUMENTARY TEAM EDITOR: SOPHIE BRUNET
In addition, Campos ups the meta by including Jean-Xavier de Lestrade (played by Vincent Vermignon) and the original documentary’s producer and fellow Oscar winner Denis Poncet (played by Frank Feys) as characters in the film. In a major coup, he gets Juliette Binoche to play Sophie Brunet, the documentary’s editor, who fell in love with Michael while editing the film. She started a correspondence with him while he was in prison and was instrumental, together with the documentary, in getting his case reviewed, especially after it became known that a particular witness had falsified essential laboratory results in Michael’s and many other cases.

MICHAEL PETERSON’S LEGAL TEAM
Michael Stuhlbarg (David Rudolf, Michael’s senior attorney).
Justice Leak (Tom Maher, Michael’s junior attorney).

THE PROSECUTION – D.A.’S OFFICE
Cullen Moss (Jim Hardin, the prosecuting DA).
Parker Posey (Freda Black, assistant prosecuting DA).
Susan Pourfar (Dr. Deborah Radisch, the State Pathologist, whose damning testimony sealed Michael’s conviction and the resulting sentence of life imprisonment – he did eight years before his release).
The result: compulsive viewing for seven out of the eight episodes.
COLIN FIRTH
Colin Firth is spellbinding. By turning likable and repulsive, he gives us this slippery, selfish character who forgot how to tell the truth in infancy. For most of the series, as one surprise after another springs on us, we vacillate between wanting him to be convicted and wanting him not to be sentenced.
TONI COLLETTE
Toni Collette, although in a more minor role, is equally superb. You can pick out several of her scenes that are so memorable they go into your TV database for life. Kathleen is miserable. She knows she is used to supporting Michael and his four children. In addition, Michael is bisexual, and he spends a lot of time cruising the clandestine gay pickup spots of Durham. She has a clue that he is screwing around. The feeling that he does not love her anymore. There are two scenes where her pain and sorrow are conveyed precisely. In one, we are at a party hosted, of course, by Kathleen. She is drinking a little too much, as always, and after talking with Michael and a few guests, goes silent for a few seconds and then jumps into the swimming pool. It catches you off guard and is the perfect cri de coeur.
MICHAEL STUHLBARG
The rest of the cast is uniformly excellent, with Stuhlbarg a standout as the uber defense attorney (a momentous year from him with his riveting performance as Richard Slacker in “Dopesick”), DeWitt as sister Candace, a fury of revenge, and Posey, who makes every effort to impress as southern belle assistant DA Freda Black.
JULIETTE BINOCHE
The final episode is disappointing and should not have been added. The trial is over, and we leave Durham behind and move to Paris, where Juliette Binoche’s Sophie Brunet becomes the central character. She is fine. She’s more than satisfactory. However, her discussions—arguments, really—with de Lestrade and Poncet are so off that they elevate the series to another level. Poncet, especially, is very poorly served. He is purely there as a sounding board for Brunet. It pains us to hear an intelligent man speak in this manner. What must it have been like for him?
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