my favorite scene, Elizabeth and Cecil

My favorite scene in the series was when Elizabeth and Cecil have a quiet discussion in his office. It is wonderfully underplayed. She seems to know that he is corresponding with James VI, the King of Scotland. He does so to help prepare James to succeed her. He knows that such communications are treasonous.
Elizabeth says nothing about her feelings. But you know from her words, although quietly spoken, what she is thinking about Cecil and that she is really warning him to stop. We know by the look on Cecil's face that he fears that she has found out. Everything in the scene's dialogue is suggested, not spoken outright. That adds to the tension.