Season 5, Episode 6, "The Dickensian Aspect"

WARNING: SPOILERS AHEAD! McNulty tries to out fake Templeton, by claiming that there's fake probable cause for wiretapping the Baltimore Sun because Templeton faked a call from the "serial killer." Without even waiting for approval, Freamon sets up a wiretap on Marlo's phone. Omar plays hide-and-seek in the utility closet at the same apartment complex from which he made his "Spider-Man" jump, while Chris, Snoop, and more of Marlo's minions are left scratching their heads. Bunk channels the angry energy that he has for McNulty into trying to solve a case the old-fashioned way, but runs up against bureaucratic lab incompetence. Carcetti turns the homeless killings into a campaign opportunity. Marlo now wears the crown at the New Day Co-Op.