filming on President and PPW earlier this morning?

I looked out my window this morning and saw a film crew on my block, filming a house close to mine. Unfortunately, I couldn't get it in gear early enough to go out and ask someone what was being filmed, and they've already left. I'm going to assume it was "Law and Order" since they were in and out so quickly, but I don't know which of the five million "Law and Orders" it is or which episode. Anyone have some info on this?