Filming on city streets in marginal neighborhoods carries its peculiar risks and rewards. On one occasion, a car involved in a high-speed chase smashed into one of the actors’ cars, and everybody had to dive out of the way. Another time, a man got shot yards away, staggered onto the set trailing blood, and was treated by the show’s medic. Once, a man pressed a package of heroin into the hands of Andre Royo, the actor who plays the sympathetic junkie and police informant Bubbles, saying, “Man, you need a fix more than I do.” Royo refers to that moment as his “street Oscar.”