"I'm not- I just... I need to see this through," Danny said quietly.

He studied the cap on the bottle, then cracked it open and took the pill.

"After Alex was killed I- It was hell. I don't think I told you just how bad it was. I wasn't just accused of killing him, I didn't just have my name smeared in the papers, I had every security service in the world on me. Threatening me, stalking me... All because I had this information I didn't know how to interpret. I know now what it was, of course, but- Point is I couldn't let it be. At first because he deserved justice, but in the end because I- I couldn't stop. I needed to solve it."

He held House's gaze for a long moment, then looked away.

"Surely you, of all people, get that."