Watson: Well, it certainly sounds like you had feelings for her.
Holmes: Perhaps but... nothing so mundane as love. I was adrift back then. I had-had no purpose. My so-called peers made me feel that that might always be the case. Abigail, she gave me a gift. A view inside a mind capable of murder.
Watson: So she was your first.
Holmes: Killer, yeah. Without intending to, she-she helped me understand who I was and-and what I might do with my life.
Holmes: First time in my career someone's alibi for murder has been that they were busy planning the same murder. If it weren't so frustrating, it would be interesting.
"Sleepwalker" by Battle Tapes
"The Burnin'" by Nik Amma
"State of the Art (A.E.I.O.U.)" by Jim James (end of episode, Holmes talks to the real killer and with him at the gym boxing)
Special billing was given to Aidan Quinn (and) for this episode.