After Mark Ruffalo wrapped I Know This Much Is True , the 2020 HBO limited series based on Wally Lamb’s tragic novel about a paranoid schizophrenic man in the wake of a violent breakdown, he decided he needed a break from heavy material. He was looking for a comedy, but the comedies weren’t coming. He made Poor Things and All the Light We Cannot See and then HBO came calling again — with a show centered around a grieving FBI agent. “They were like, I think we might break him,” Ruffalo says with a laugh.
But the actor read the script and was instantly captivated by the depth of the lead character. “It described this habit he has of swirling his drink with his finger and then licking and shaking it, and I was like, who is this guy who does that?” he says. “I loved it. And I