Season 1, Episode 7 "One Arrest"-Bird is "questioned" by Kima and McNulty about the William Gantt shooting, while Bunk talks to his eyewitness, Omar, just outside the interview room.
Season 3, Ep. 11 "Middle Ground"- The relationship between Avon and Stringer continues to crumble as Stringer orders Slim Charles to carry out an order.
Season 1, Episode 1 "The Target"-McNulty talks to Judge Phelan, forcing the Police Department brass to respond by beginning the Barksdale investigation.
Season 2, Episode 6 "All Prologue"- Bunk and McNulty drink by the train tracks at night, then Bunk feels it the next day in a meeting with Freamon, Russell and Daniels.