Grace and Carlos work together when they suspect a young woman was a victim of a black market organ trafficking ring; Owen's brother Robert comes to visit and meet T.K., but surprises Owen with news that can affect the Strand family.
Rosewood testifies for the prosecution during a murder trial -- going up against his father (Vondie Curtis-Hall), the expert witness for the defense; a surprising announcement has unexpected consequences.
The BAU searches for a subject who is targeting prominent members of the community.
The serial sniper the team is trying to catch begins to taunt Mick.