It’s a story he has told many times. But it hits different in person, as the gentle fellow in a fitted black T-shirt recounts how he felt a bone-deep connection to the irascible Roy. The face is essentially the same, but the eyes are too friendly and the voice is smooth and mellifluous where Roy’s is a clipped growl.

“I get that you would be confused by this,” Goldstein said, setting his coffee cup neatly into its saucer. “But I very much relate to the anger. I used to be very, very miserable and had a quite dark brain, and I’ve worked very hard at changing that. But it’s there.”

Lawrence said that “of all the shows I’ve ever done, Brett is one of the top two people in terms of how different he is from his character.” (The other: Ken Jenkins, the friendly actor who played the caustic Dr. Kelso in “Scrubs.”)

In some ways the connection between actor and character is clear. Both are prolific swearers, for one thing, and Goldstein lives by the chant that defines his famous alter-ego: He’s here, he’s there, he’s everywhere.

Colleagues and friends are stupefied by how much he does. While shooting the first season of “Lasso,” he was also flying to Madrid to shoot “Soulmates,” the sci-fi anthology series he created with Will Bridges. During filming for Season 3, he acted in “Lasso” by day and joined the “Shrinking” writers’ room on video calls by night. He found time to interview comics, actors, filmmakers and friends for his long-running movie podcast, “Films to be Buried With.” He regularly squeezed in standup sets.

“I’m not sure when he sleeps,” Dunster said. “But I know he gets it in, because he looks so young.”

Goldstein said his workaholism predates his newfound Hollywood clout. “Even when I was doing stuff that no one was watching, I was always working,” he said. “Either I’m mentally unwell, or genuinely this is the thing that gives me purpose and makes me happy.”