: The Behavioral Analysis Unit (BAU) travels to Philadelphia to investigate a series of brutal bludgeonings linked to the city's boxing scene .
: The killer is Jimmy Hall, a boxer whose violence is fueled by the emotional trauma of his young son's terminal cancer.
: The episode features a widely recognized heartbreaking scene where Jimmy says goodbye to his dying son, causing even the typically stoic Hotch to show visible emotion.
: The Behavioral Analysis Unit (BAU) travels to Philadelphia to investigate a series of brutal bludgeonings linked to the city's boxing scene .
: The killer is Jimmy Hall, a boxer whose violence is fueled by the emotional trauma of his young son's terminal cancer.
: The episode features a widely recognized heartbreaking scene where Jimmy says goodbye to his dying son, causing even the typically stoic Hotch to show visible emotion.