Anthony Carrigan was 7 the first time he stepped onstage. And he was terrified. Debilitating stage fright, which he would struggle with for decades, would have led most children to consider alternate careers. Carrigan, a star of the tar-black HBO comedy “Barry,” was not most children.Because even that first time, he felt something beyond terror. Diagnosed at 3 with alopecia areata, an autoimmune disorder that attacks the hair follicles, he often found himself stared at, gawked at, even in elementary school.“People would look at my alopecia and not really look at me,” he said. “That’s kind of a weird dehumanizing thing, when someone is looking at a part of you.” But onstage, he felt as though he could control how people saw him — which meant he could make sure they saw all of him, or at least all of the character he was playing.They are seeing him now. On, “Barry,” which returns for its fourth and final season on Sunday, Carrigan, 40, plays the gangster NoHo Hank. Originally meant to die in the pilot, NoHo Hank, powered by Carrigan’s sweeping, sunshiny, Emmy-nominated performance, has survived multiple assassination attempts and a presumed panther attack. The character has become a fan favorite, complete with catchphrases (“Hey, man,” “super great!”) and multiple GIFs of a Season 2 rooftop folk dance.Two days before I met him, a young woman stopped him on the street. “She just wept, like, Beatles-level mania,” he said. “She was really lovely, though, very sweet.”We were speaking on a Monday afternoon in early April at the Tin Building, an upscale food hall in Lower Manhattan. (He is based in Los Angeles, where “Barry” shoots, but his girlfriend lives nearby.) Alopecia has rendered him bald and without eyebrows or eyelashes, a look that causes a momentary neural jar, until the force of his personality — buoyant, sincere, self-actualized — takes over. Carrigan comes here often. Maybe not often enough.Originally meant to die in the pilot, NoHo Hank (Carrigan, left, with Michael Irby) has become a fan favorite, complete with catchphrases and many GIFs in his honor.Merrick Morton/HBOHe hadn’t made a reservation at the oyster counter, and for a moment it looked as if he wouldn’t be seated. I joked that he could pull a “Do you know who I am?” maneuver, and Carrigan had the decency to look appalled.“I’ve never done that!” he said. Once seated, he listened politely as a server described the oysters of the day. He declined the ones from Massachusetts. “I’m from Massachusetts; I know how salty we are,” he said, and ordered a dozen from Canada and Maine.After high school in Massachusetts, he studied acting at Carnegie Mellon University. His hair loss was still isolated to patches at that time, and professors often cast him as the longhaired bad boy, a look that determined most of his early roles. That hair and the worry that he would lose it were sources of anxiety. And after landing his first major role, as an amateur detective on the one-season Jerry Bruckheimer series “The Forgotten,” his alopecia progressed and he did lose it. At first he covered up, with hairpieces and eyebrow makeup, a must for character continuity. But when the series ended, he put the hairpieces away.“I really had nothing to lose at that point,” he said as he spooned horseradish onto an oyster. “Because I had no idea what my career was going to look like. I just knew that it was either try it with the way that I looked, or I was going to have to find a new career.”So he kept going, without wigs or false lashes, even when his representatives argued for them. He worried that this new appearance would limit the roles he was seen for. It did. But he suspected that this new self-acceptance would free him as an actor. Whatever parts did come his way, he would play the hell out of them.The parts did come. Gone was the bad boy. In its place, he discovered, was the bad guy. He began to play villains, chief among them Victor Zsasz, the psychopath he played for 20 episodes on the Fox superhero series “Gotham.” He fretted, sometimes, that he was helping to reinforce a stereotype of bald men as sinister. But it kept him in the Screen Actors Guild. And it netted him an audition for “Barry.”NoHo Hank, intended as a minor antagonist, is a member of a Chechen mob. Carrigan had little interest in playing another villain. But the script’s violent comedy delighted him. He went back to the formal exercises of his college days. How should Hank move? What animal would he be? A scorpion, he decided, which explains the puffed-out chest, the hands on hips, the scuttling walk.“He’s a lovable scorpion,” Carrigan explained at the oyster counter. “He doesn’t want to sting anyone, he doesn’t want to hurt anyone. But that’s just his nature.”He made his audition tape and sent it in. Alec Berg, a co-creator of “Barry,” recalled being struck at first by Carrigan’s atypical appearance, then by his skill and commitment.“For me, I just completely forgot that this is a guy who doesn’t have hair,” Berg said in a recent phone interview. “He just was that character so thoroughly.”When he and the series star and co-creator, Bill Hader, met Carrigan in person, they knew they couldn’t kill Hank so quickly. “He was lovely and so imaginative, he really understood the comedy,” Hader said, in a separate interview. “I was like, ‘I’d like the option that this guy lives.’”Hader described NoHo Hank as a “heavy.” But in Carrigan’s hands and in the wardrobe department’s shrunken polo shirts, he became the lightest heavy imaginable. He’s a people pleaser, a charmer. During a Season 2 near-death experience, he tells his underlings, needlessly, in his Chechen-accented English: “I know you look at me and see hard-as-nails criminal, stone-cold killer, ice man. But, uh, this is lie.” Hank should have had a career in hospitality, Carrigan said. Hank has said as much himself.Carrigan’s command of the role is exhaustive. He often devises new idioms for Hank, as when he substitutes “kid and the poodle” for “kit and caboodle” in a Season 4 episode. And he preapproves each polo shirt.“I’m playing the bad guy, but making him likable, making him winning,” Carrigan said.In playing both sides of Hank — Hank’s cheer, Hank’s sting — Carrigan complicates the stereotype of the bald villain, allowing “Barry” to pose knotty questions about good and evil, action and intention. Hank, that likable guy with the juice boxes, has killed an awful lot of people.“People would look at my alopecia and not really look at me,” Carrigan said about beginning to lose his hair as a child. But onstage, he felt as if he could control how people saw him.Evelyn Freja for The New York TimesThe complications that Carrigan brings to the part have drawn the attention of other directors. He played a robot in the 2020 comedy “Bill & Ted Face the Music.” Paul Weitz cast him as comic relief in the 2021 Kevin Hart film “Fatherhood,” attracted, Weitz said, by Carrigan’s “baked-in love of performance and love of human eccentricity.”So far, no role has rivaled Hank in its complexity or its blood-spattered joy. Carrigan knows this better than anyone. When “Barry” wrapped, just before Thanksgiving, he hung up Hank’s costume for the last time and there, in his trailer, said goodbye to him, thanking Hank for the chance to play, to experiment, to make mistakes. Then he stole Hank’s watch, a fake Rolex.Berg bet that Carrigan would find other roles. “He’s just the nicest, most genuine, friendly, lovely guy,” he said. “Part of who he is goes into Hank, but he’s not just playing himself, he’s really performing.”“I don’t think it’d be hard for him to step outside of that,” Berg added, “play other things.”When I met Carrigan at the oyster counter, he was trying to take that step. He had recently returned from a location shoot in Kentucky for a new film. And the director Alex Winter, his co-star in “Bill & Ted,” was writing a role for him in another movie. “He has heart and he has physicality,” Winter said. “And he has an incredible sense of humor.” Is the character a villain? “Everyone’s a villain in this thing,” Winter said.If Carrigan worries that no subsequent role will be as beloved as NoHo Hank, he worries less than he used to. “When I’m able to curtail my anxiety enough to feel loose and feel free, then I can go in any direction,” he said.As he ate his oysters, I noticed a signet ring on his finger, a recent gift from his girlfriend. The ring shows a rabbit. Rabbits are famously fearful animals. But this one, Carrigan pointed out, was running free. “The fear is no longer taking up space,” he said.He turned it around, showing an engraving of a trap. Would the rabbit fall into it?Carrigan shook his head. “I think he’s already escaped it,” he said. More