I have been watching Elementary since it's start. Love that show. I noticed it too! As soon as he was leaning against it, I caught the angle of the windows and roof. I said aloud "Hey that's a square body dually" Looked pretty cool from what I saw. Yes it was pretty dark.
Capt, it's a new show on it's second season, based off of Sherlock Holmes. Set in modern day times in New York City. The main character is in fact named Sherlock Holmes, his assistant is a retired doctor, a woman named Joan Watson. I have to say it is a very good show.