The British actress is reprising her role as the Jewish physician at the center of an ethical drama. “It’s like a tailored suit,” the director Robert Icke said.At the start of Robert Icke’s “The Doctor,” the actress Juliet Stevenson stands alone in a spotlight onstage. “Am I sure? Yes. Yes!” she says crisply as if to an invisible interlocutor. “I’m crystal clear. I’m a doctor.”As the play’s title character, a grammatically exacting neurosurgeon named Ruth Wolff, Stevenson will repeat those last two phrases many times as events unfold and Ruth’s clarity and intellectual certainties erode. Eventually they will transmute into something far more inchoate as her life unravels, and self-doubt begins to permeate her conviction that being a doctor is all that matters.“The Doctor,” which opens Wednesday at the Park Avenue Armory in New York, is a reworking of Arthur Schnitzler’s 1912 drama, “Professor Bernhardi,” about a Jewish physician who refuses entry to a Roman Catholic priest trying to administer last rites to a patient dying from sepsis after an abortion. In Icke’s version, the issues go beyond questions of medical ethics and religious affiliations to include identity politics and cancel culture.The play, and Stevenson, received rave reviews when “The Doctor” was first presented in 2019 at London’s Almeida Theater, where Icke was then the artistic director, and later after it transferred to the West End. “One of the peaks of the theatrical year,” Michael Billington wrote in The Guardian, adding that “while Stevenson shows how integrity can turn into obduracy, she also beautifully portrays the human cost of making medicine one’s god.”During an interview, Stevenson, 66, said the piece “takes a lot of the preoccupations of our time and plays them out on a very large, Shakespearean scale. Nobody’s right. Nobody’s wrong. We can explore all the angles because it’s safe. We’re on a stage, it’s a play!”After a long rehearsal, she was enthusiastic and voluble during our conversation at the Bishopsgate Institute, a cultural center in East London. “I have always wanted to put myself at the service of great writing, share it with people in the dark,” she said. “Every culture has that ancient ritual.”In Britain, Stevenson is a familiar face who has taken on a variety of roles onstage and on-screen since graduating from the Royal Academy of Dramatic Art in 1978. But to U.S. audiences, she is probably best known for the 1990 Anthony Minghella film, “Truly, Madly, Deeply,” a romantic comedy about a woman mourning her dead lover, who returns as a ghost.“I don’t want to play King Lear any more. I want to tell women’s stories,” Juliet Stevenson said about the lack of roles for women over 40. An image of a wolf, her inspiration animal, is affixed to her dressing room mirror.Sabrina Santiago for The New York TimesShe never aspired, she said, to a Hollywood career. “I am not at ease in the industry and no good at all that glamour stuff,” she added. “I am not an actress because I felt this face has to be on a screen.”And despite playing lead roles in major West End productions that have moved to Broadway, including “Les Liaisons Dangereuses,” her only previous appearance in New York was a 2003 City Opera production of Stephen Sondheim’s “A Little Night Music.”“I never wanted to leave my children for long stretches while filming or acting outside the U.K.,” Stevenson said. “But now my youngest is 22, and I am free!”She comes “with this relish,” she said for a first-time move from the West End to New York: “It’s amazing to have a first time at my age!”“The Doctor” is Stevenson’s third collaboration with Icke, after playing Gertrude in his 2017 production of “Hamlet,” starring Andrew Scott, then alternating with Lia Williams in the roles of Mary, Queen of Scots and Queen Elizabeth I in his update of Friedrich Schiller’s “Mary Stuart.”Stevenson first met Icke in 2010 at the Almeida Theater, where he was then an associate director. “We did a gala with a whole lot of famous actors doing Shakespeare, and I offered to run lines,” Icke recounted in a telephone interview from New York. “Juliet was the only person who wanted to rehearse and wanted notes. She was performing a very difficult bit of ‘As You Like It,’ and there was something about the rhythm and music of what she was doing that was amazing, and I stored it up.”They kept in touch, and, in 2015, when Stevenson congratulated Williams backstage, after watching her performance in Icke’s “Oresteia,” the director had a flash of inspiration. “I had been thinking about “Mary Stuart” for a long time, and looking at Lia and Juliet, I realized if I solved the problem of how to cast it by not solving it and doubling the roles, I had the key.”These parts in Icke’s productions have been important moments in her career, Stevenson said, adding that she would never have taken on Gertrude in “Hamlet” without his insistence. “I thought, ugh, these voiceless women in Shakespeare,” she said, “but he took that problem, that silence, and put it in the center.”But there have been many important moments, starting when she was around 10 and performed a W.H. Auden poem, “If I Could Tell You,” at school, she said. “It was the first time I felt a light bulb go on, felt I had to be a vessel for the poem to pass through me to an audience.”Jeremy Irons and Stevenson in New York City Opera’s 2003 production of the musical “A Little Night Music” at the New York State Theater.Sara Krulwich/The New York TimesStevenson, the youngest of three children, lived abroad with her family as her father’s job with the British Army’s Royal Engineers took them to Germany, Australia and Malta. At 9, she encountered “an amazing drama teacher, Bess Jones,” at a boarding school just outside London, and started to go to the theater in her teens. When she saw “King Lear,” she immediately wanted to play the title role. “I was just possessed by it, the size of his anger, passions, love, regret, grief,” she said. “I stomped around being Lear for months; of course he is just like a badly behaved adolescent!”She successfully auditioned for the Royal Academy — “a culture shock” — where she felt lost and insecure until a teacher harshly criticized her performance of a speech from “Antony and Cleopatra.” “My anger found its way into the words, and I could feel the temperature of the room change,” she said. “I thought, OK, this is what acting is.”After graduating, she found ensemble work (“Shape No. 2, Sea Nymph No. 2 and Hellhound No. 3”) in a Royal Shakespeare Company production of “The Tempest,” and stayed for eight years playing lead roles in Shakespeare productions and new plays, and working with directors like Peter Brook, Trevor Nunn and Howard Davies.She had also started working in film, appearing in Peter Greenaway’s “Drowning by Numbers” and “a couple of forgettable movies” before working on “Truly, Madly.” Also in 1990, she performed in “Death and the Maiden,” winning the best actress Olivier Award in 1992, and met her future husband, Hugh Brody, an anthropologist. Over the next two decades she had two children and played a dizzying number of roles onscreen (“Emma,” “Bend It Like Beckham,” “Departure”) and onstage (“The Duchess of Malfi,” “Private Lives,” “The Caucasian Chalk Circle,” “Duet for One”).“Juliet pours her life and love and soul into everything,” said the theater director Natalie Abrahami, who worked with Stevenson in Beckett’s “Happy Days” and “Wings,” by Arthur Kopit. “She is always pushing, really good at asking instinctive, actor-led questions: ‘Why would the character act this way? What memory is triggered here?’ She is always making the map of a character’s life as three-dimensional as possible.”In “The Doctor,” Stevenson “climbs an extraordinarily difficult mountain with Ruth,” said Naomi Wirthner, who plays Ruth’s antagonist, the surgeon Roger Hardiman. “It’s a rock face that she climbs every night, every rehearsal, and just when you think she is at peak Ruth, she will find a deeper, stronger layer.”While writing “The Doctor,” Icke said, he was thinking about “the genius archetype, cancel culture and how society deals with the exceptionally abled. The examples are usually men, like Picasso, but I was interested in the interaction of genius and femaleness.”He knew, he added, that he wanted to write “a virtuosic, lead-actor play, like ‘Jerusalem’ with Mark Rylance. There is something about watching a great actor shoulder a big boulder and drag it up the hill. This was very specifically written for Juliet. It’s like a tailored suit; there isn’t a line of Ruth Wolff that is innocent of the knowledge that it will be spoken by her.”When he sent Stevenson the script, it spoke to a long-harbored frustration. “I had got really fed up with the lack of roles for women over 40,” she said. “And I don’t want to play King Lear any more. These are men’s stories, and I want to tell women’s stories.”She added that coming back to “The Doctor” after a break “was like holding up a mirror to so many cultural tensions: the demonizing of otherness, George Floyd, antisemitism, the agonizing history of abortion in the U.S.” The play also responds through its eclectic casting, she said, to the policing of which actors can play which characters. “When you see a white actor and discover the character is Black, it forces you to think, would I have reacted differently to that situation had I known that?”Warming to the theme, she continued.“My job description as an actor is to tell other’s stories, to imagine myself into other people’s lives,” she said. “Let’s not lose our richness. Let’s throw all these subjects up in the air and let them catch the light as they fall.” More