"A man must have a code." - Bunk.

Tipped off by the wire, Greggs, Herc, Carver and Freamon make a bust, but the incident makes Avon and Stringer suspicious, leading them to close shop in the Pit. Meanwhile, Bunk and McNulty look for another witness in the Gant slaying and hunt a suspect known as 'Mr. Bird.'

'It don't matter that some fool say he different...' -- D'Angelo

Trying to let go of police work and return to his marriage, McNulty gives up on identifying his Jane Doe. In their investigation of Sobotka, the detectives discover a pattern in the computer and explain the connection to Daniels, but he still won't take the murders. Sobotka tries to play the political game on behalf of his union.