Jeremy Strong is not known for his sense of humor. When getting dressed, he favors brown for its “monastic” connotation. He famously thought that Succession, the HBO show that shot him to stardom, was a straight drama when his co-stars believed it to be a comedy. When he sits down for our Zoom conversation in September—in a brown shirt, of course—he recites poetry and quotes Stella Adler, the godmother of Method acting.