Stacy Keach plays Archbishop Kevin Kearns in "Blue Bloods", the influential Catholic Church member who frequently has standoffs with Frank Reagan, played by Tom Selleck. In addition to his extensive acting career which includes over 200 credits, Keach is also known for his stage appearances and is considered a pre-eminent American interpreter of Shakespeare. Meanwhile, Will Estes, who plays Frank's son on the show, thinks that Selleck is incredibly similar to his character, calling him professional and well-studied.