Radcliffe anticipated this. When he recruits a woman in my aisle to play a more substantial role, he confides in her that the people who seem too eager to leap onstage with him “scare me.” This from a man who once drew thousands of fans to Trafalgar Square to catch a glimpse of the teenage wizard at a film premiere. He is a touchstone of millennial childhood, and despite his best efforts to shed himself of Harry Potter—his first onstage role, in Equus in 2007, required nudity, effectively announcing his graduation from child actor—he can never quite escape its unyielding grip on the culture. Another audience member he pulled onstage, Radcliffe tells me the next day, turned out to be the father of a cast member of Harry Potter and the Cursed Child, playing a block away. And reporters writing about the show have bombarded him with questions about the forthcoming HBO TV adaptation of the books.