13 episodes · 2002

On the drug-infested streets of West Baltimore, there are good guys and there are bad guys. Sometimes you need more than a badge to tell them apart. Season 1 follows a single sprawling drug and murder investigation in Baltimore — one that culminates in a complex series of dangerous wiretaps and surveillance.

12 episodes · 2003

McNulty's on harbor patrol. Daniels is in the police-archives dungeon. Prez is chafing in the suburbs. Greggs has a desk job. The detail may be on ice, but corruption marches on . . . and a horrific discovery is about to turn the Baltimore shipping port inside out. Setting up in the wake of the first season's joint homicide/narcotics detail that exposed a major drug operation — and left its members stigmatized and reassigned — the second season expands to include not only familiar drug dealers, but a group of longshoremen and organized crime members who are caught up in a major homicide case.