<P> The episode also marks the first appearance of recurring Baltimore police department officers Major Bobby Reed, commander of the internal investigations division (IID), and Major Stanislaus Valchek, Southeastern district commander and Prez's father - in - law . Valchek plays a major role in the second season, and appears in all five seasons of the show . </P> <P> A San Francisco Chronicle review picked the scene of D'Angelo instructing his subordinates in the rules of chess as one of the first season's finest moments . They praised the character of D'Angelo and the show's portrayal of his difficulties as "middle management" in the drug organization having to deal with unreliable subordinates, demanding superiors and his own conscience . </P>

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