The twin brother of a murder victim insists that the dead man's girlfriend is responsible, but the men and women of Homicide have their doubts. Elsewhere, several of the male detectives are moonstruck by attractive new arrival Rene Sheppard (Michael Michele); Mike Giardello (Giancarlo Esposito) has requested a transfer to the FBI's Baltimore bureau, but hasn't yet picked the right time to tell his father, Al (Yaphet Kotto); and Ballard (Callie Thorne) and Gharty (Peter Gerety) find themselves tied up in a jurisdictional boondoggle when a teenager found shot in Baltimore turns out to have been killed in Washington, D.C., following a bungled drug deal. Anthony Joseph Perry of Aerosmith guest stars as D.C. narcotics detective Joe Landrewsky. ~ Hal Erickson, Rovi