By Joe Otterson According To The variety SPOILER ALERT: This article contains spoilers for “The Penguin” Episode 7, “Top Hat” Things go off the rails in “The Penguin” Episode 7, with Oz’s drug operation that’s hidden in the abandoned trolley tunnels in jeopardy, along with his mother. But first… This week’s penultimate episode of HBO‘s DC series begins with a flashback of Oz and his brothers as children, the first time in the series we have seen his brothers alive. They live with Francis, their mother, in an apartment, with their mom making a living doing the books for Rex Calabrese, the local gangster Oz had spoken about so glowingly in Episode 1. Their mom sends them out one afternoon, where the kids run into Rex. He slips them $50 to give to their mom once they get h...