Intent on trying to make amends with Nathan, Caroline had no idea that Nathan was looking at Cecelia, not her.

"Again."

Nathan looked at Cecelia unconsciously and intentionally as he said this. It was hard for Cecelia not to guess at his motives.

The bombing. Cecelia was very direct in letting Nathan know that she was responsible for that.

Now Nathan looked at her and said "again," suggesting that he thought Cecelia is plotting something "again" in Clark's death.

Cecelia, however, didn't care about Nathan's suspicions about her. She just smiled and waited for Nathan to decide.

Nathan threw the broken tooth into Caroline's arms and coldly said, "I'll leave...