him to return to the corners to make money. Stringer interrupts the meeting. He warns Avon about the consequences of war. Avon criticizes Stringer as being too concerned with money and having lost his hard edge for the street and warns he may not be smart enough for the business world. Stringer says that thinking before killing does not make him soft, but Avon challenges Stringer's toughness by asking him who he has killed. Stringer reports Brianna's meeting with McNulty and reveals to Avon that he was behind D'Angelo's death, and that his was a life that had to be taken. Avon attacks Stringer, but Stringer overpowers his wounded friend and tells him that he did it for him, to protect him from D'Angelo turning against him. Stringer lets Avon up from the ground, and Avon walks away and sits down, speechless as the screen fades to black. Production Title reference Colicchio describes Colvin's plan to create drug tolerant zones using the episode title. It's a metaphor for Hamsterdam, being small in morals because the drug dealers and the drug users are protected by the law there. Epigraph Davis uses this phrase in his speech to Stringer about the need to prepare himself for moving into the world of federal corruption. Credits Starring cast Although credited, Deirdre Lovejoy, Wendell Pierce, Andre Royo, J. D. Williams, and Corey Parker Robinson do not appear in this episode. Guest stars Isiah Whitlock, Jr. as Clay Davis Chad L. Coleman as Dennis "Cutty" Wise Jamie Hector as Marlo Stanfield Brandy Burre as Theresa D'Agostino Michael Hyatt as Brianna Barksdale Melvin Williams as The Deacon Megan Anderson as Jen Carcetti Clarence Clemons as Roman Doug Olear as Special Agent Terrence "Fitz" Fitzhugh Gbenga Akkinagbe as Chris Partlow Benjamin Busch as Officer Anthony Colicchio Ryan Sands as Officer Lloyd "Truck" Garrick Michael Willis as Andy Krawczyk Richard Burton as Sean "Shamrock" McGinty Anwan Glover as Slim Charles Jonathan Orcutt as Sheriff William Zielinski as Gene - public health academic Mayo Best as Gerard Kelli R. Brown as Kimmy Christopher Mann as Tony Gray Brandan T. Tate as Sapper Ernest Waddell as Dante Perry Blackmon as Perry Fran Boyd as Needle Exchange Worker Tiana Harris as Devonne Genevieve Hudson-Price as Dee-Dee Felicia Pearson as Snoop The female needle exchange worker is played by Fran Boyd, who was one of the main subjects of David Simon and Ed