One of the great things about how The Penguin offers up a familiar yet different Gotham City is that now and then, a character or place will pop up that the audience recognizes. When this happens, those watching go to work trying to figure out how the character or place fits into the story. On occasion, the person making an appearance is easily explained. Other times, it takes a little bit of sleuthing. Sometimes, things can be so subtle that people could even miss the clues offered.