The BAU travels to Los Angeles looking for an UnSub who is kidnapping nannies and the children they care for on the same day each year.
An attractive, older Frenchwoman proposes marriage to J.T. and he accepts. Frank finds Mark and his friends watching pornography.
While investigating a deadly dispute, Kensi connects with a discharged Navy intelligence officer.
Karen gets dumped. Mark learns a lesson after bragging about a date to his friends.
Lainey returns to William Penn Academy, where she has a hard time adjusting to being an authority figure; Coach Mellor struggles with Michael Jordan's influence on modern-day basketball.
