A killer living in New Orleans, believed to had been killed in Hurricane Katrina, is back on the crime scene, slashing the throats of his innocent victims.
Athena and the rest of the team rush to the rescue after a malfunctioning blimp puts its operators and spectators around a crowded sports stadium at risk.
The family gathers to share their feelings and memories during grief counseling to cope with the loss of Traci, but a family member suddenly leaves the session.
A familiar figure to the 118 is left in critical condition after a hit-and-run incident; Athena gets help from Buck to investigate a missing person case.
The 118 is inundated by emergencies prompted by ransomware attacks; Athena relives her traumatic attack as the realtor serial rapist case is brought to trial.
The BAU team is called to Texas where they begin the hunt for a prison escapee who is leaving behind victims with his unique trademark of sewing mouths shut.
When the bodies of two unrelated victims are found hours apart in San Diego & Los Angeles, the BAU team suspects that not one, but two killers are responsible.
The BAU team searches for an amateur surgeon who amputates limbs from unwilling victims; Reid's phone calls to a mystery woman have everyone intrigued.
A man needs help from the 118 after he over-exerts himself while exercising; a groundskeeper is injured by his chainsaw; Harry's recent behavior affects Athena.
A man is reportedly carjacked, shot and subsequently buried alive; a homeowner believes their roommate is actually a ghost; Hen's past comes back for a moment.