The team goes to Houston to investigate a series of seemingly random murders at construction sites; the team notices a distinct change in Reid's demeanor.
Burrell offers his support to Daniels; Bubbles' plan backfires; Colvin tries to get Namond off the street; Omar hatches a new plan; McNulty looks to pay back a debt.
Omar calls in a favor; Royce and Carcetti make their peace; Cutty ponders his job future.
Addison must perform a complex in-utero surgery; Naomi and Sam discover their daughter is growing up too fast.
Landsman rebukes Freamon; Colvin seeks to keep his experimental class funded; Bubbles considers taking extreme measures to get rid of his nemesis.