"You asked me about revenge. But I didn't finish telling you. The man who killed my father. Yes, there was a time I wanted to murder him. So much. You and I both know what that feels like.

"Nyssa" the Doctor said in a tiny, sad voice.

"But you see, I had to forgive him."

"Forgive him!" Patrick's face twisted with disgust.

"Yes. Not for what it would do for the murderer, but for what it would do for me."