Daniels informs the detail that Prez is off the street and Herc will be on sick leave. McNulty and Greggs visit Fitz, looking to get some equipment to wire up Sydnor as he is sent undercover. When McNulty tells Fitz that Daniels is the commanding officer, Fitz appears to bite his tongue because Greggs is present. Meanwhile, Santangelo is revealed to be a mole in the detail, tasked with finding incriminating information on McNulty for Rawls. Sydnor is given advice from Bubbles on how to be more convincing as a street buyer. Together, Sydnor and Bubbles later visit the Pit. Sydnor notices with chagrin that neither drugs nor cash pass through the hands of any key players.