NEW YORK (AP) — Ian McKellen and Michaela Coel met like their characters in “The Christophers” do, with a knock on the door. Coel, taking a break from writing her upcoming BBC-HBO series “First Day on Earth” in Ghana, turned up at McKellen’s house in London to go over the script with him and screenwriter Ed Solomon. “I walked into your house,” Coel recalls in an interview alongside McKellen. “I knew who you were. You were like, ‘Hello! What are you? What are you looked and...