McCoy becomes obsessed with nailing a serial rapist recently released on parole and pushes the cops perilously close to harassment as he attempts to connect the man with a new rape and murder matching his previous M.O.

It's old home week for Briscoe when an apparent murder of a teenage model in New York develops ties to Baltimore and Detectives Munch and Falsone pay a visit to the Big Apple to observe the case. Meanwhile, McCoy finds himself battling the attorney of the victim's parents for access to his clients and the Baltimore DA for jurisdiction.

This crossover continues on Homicide: Life on the Street S06E05 Baby, It's You (II).