Cory has a hard time with the fact that graduation is bringing unexpected changes.
Dr. Lewis' sister returns, claiming to be sober and wants custody of the daughter she abandoned.
Three United Nations delegates visit: a physician who is similar to Charles, an Army officer who teaches yoga and a Swede who catches Margaret's attention.
Warrick investigates the drive by murder of a young girl in his old neighborhood. (TV-14)
When the chief investigator of a controversial report documenting corruption within the NYPD is gunned down the day before his findings are published, Mac and Stella must find the killer, launching a massive search that makes every officer listed in the report a suspect. (TV-14)
