When four men from Oregon go missing, the team looks for a common link; J.J. is upset when her son doesn't want to celebrate Halloween.
The team searches for a killer in Miami who started out slaying animals and then quickly progressed to murdering prostitutes; Morgan asks Reid to join the bureau softball team.
The BAU team heads to Los Angeles in search of a suspect who kidnaps nannies and the children they care for.
The team has a difficult time finding a common denominator among several male victims in Montana; J.J. struggles with feelings about her sister's death.
The BAU investigates when bodies are exposed by tornadoes in Kansas; pressure at work affects J.J. at home.