Gloria does not like Jay's reaction to the arrival of Manny's father (Benjamin Bratt); Phil is rushed to the hospital; Mitchell and Cameron try to sleep-train Lily.
Addison returns to Seattle to perform a procedure on Mark's pregnant daughter; Cristina is assigned the lead on a complicated surgery.
A serial killer (Alex O'Loughlin) sends the team a videotape, detailing one of his crimes and asking them to help him stop his murderous ways.
Gang members steal Detective Salinger's weapon; a man exposes himself to Detective Adams.