As Florrick/Agos move into their new offices, Alicia represents an undocumented immigrant who faces deportation unless he testifies against a member of a drug cartel. Also, Marilyn is concerned about the ethical ramifications when Eli reconnects with Natalie Flores, and Robyn tries to be more like Kalinda. America Ferrera returns as Natalie Flores.
Grissom and Stokes are called on to identify the skeletal remains of a murdered woman, while Warrick and Sara investigate a shooting by a cop.
Jack turns to the only person he can trust, ex-CTU agent Tony Almeida, as he tries to figure out which CTU employee is working with the terrorists. Edgar tells Driscoll about Marianne.
The squad investigates the murder of a young Chinese girl along with an alleged rape case. Irvin learns his father is dying. Clark tries to find a foster home for James Kilik.
On Mac's flight to D.C., an air marshal is found murdered shortly after take off. Mac is certain the killer is on board and searches for the murder weapon. (TV-14)