The BAU team investigates the abductions of young children with troubled mothers in St. Louis. Also, Rossi reconnects with his first wife who has shocking news for him.

The BAU tries their luck in Atlantic City when the team is called in to investigate a series of ritualistic casino-related murders. Also, after a spat with her boyfriend, Kevin, Garcia thinks she and Morgan may have gotten a little too friendly with each other.

A serial killer is executed, in Oklahoma, a copycat shows up and the BAU are called to find him. Meanwhile, Prentiss gets nervous about a real estate purchase.

The team heads to Oregon as four men have gone missing.

The BAU heads south to investigate a fast-moving UnSub whose signature matches that of a serial killer from 30 years ago. Also, the team learns that someone is tracking their cases and replicating crimes the BAU is solving.

When a time capsule in a small Colorado town is opened twenty-five years later and contains a gruesome discovery, the BAU investigates the crime and find a possible link to the death of a local police officer.

The BAU are called to Utah to investigate the murder of a women who died by being buried under stones. All while Penelope plans a Day of the Dead party.

As the team searches for a vigilante killer in Cleveland, Rossi's former Marine sergeant goes missing in Los Angeles; J.J.'s secret catches up with her.

Victims of arsenic poisoning are found in Long Beach. The investigation reveals that the killer has a fascination with Greek mythology, based on handwritten death threats to the deceased and other mysterious clues. Meanwhile, Hotch becomes concerned about participating in Jack's third-grade career day.

The BAU is stumped to find the common denominator among male victims in Montana, making in difficult to profile the UnSub. JJ confronts her feelings about her sister's tragic death.

The BAU searches Tallahassee for a serial killer who calls the authorities to report the crimes prior to committing murder. Also, as Rossi prepares for a weekend visit with his daughter, Joy, he receives startling news about the death of a comrade in Vietnam.

When a Maryland family is found murdered at their dining room table, the team tracks down other family members and friends to uncover secrets that may have led to it. Also, Hotch must try to make peace with his father-in-law, Roy, after discovering he’s been diagnosed with Alzheimer’s.

When the BAU investigates incidents of bodies being incorporated into macabre graffiti art in Detroit, they suspect an elusive-yet-notorious street artist could be the UnSub. Also, Dr. Lewis struggles to balance her relationship with her fiancé and her work.

The BAU searches for an UnSub who may be fascinated with medical experimentation.

The BAU heads to Wichita in search of an UnSub abducting children while their parents sleep. Also, Morgan tries to find who was responsible for his attack.

The BAU team searches for a serial killer along the Appalachian Trail in rural Virginia.

Reid has returned from Houston, where he was visiting his mother who is in a new facility on an experimental drug program. He is called back home from the office while the rest of the team heads off on their next case. It isn't until the team is in the air that they learn that Diana is no longer in the Houston facility, but that she is now living with Reid, as the trial drug was not having the intended effect.

Three victims are found tied to stakes in the Arizona desert.

The BAU investigates three similar crimes in which victims' remains are discovered in old suitcases.

When a series of backyard pool homicides are reported in California, the BAU team searches for an UnSub with a puzzling past.

The BAU travels to Chicago to investigate an unsub who leaves red roses on each victim. Also, Rossi gets an unexpected visit from his ex-wife, Krystall Richards.

When the mummified remains of numerous victims are found in the walls of an elderly couple's remote South Carolina home, Rossi, JJ and Simmons are dispatched to track down a trail of clues that date back over 20 years. The hunt becomes urgent after BAU learns the killer has a specific ritual of when to strike, and like clockwork another person goes missing. Rossi reconnects with his ex-wife.

Prentiss and the team fly to Iowa to investigate the disappearance of three 10-year-old children who appear to have been abducted from their homes in the middle of the night, with surveillance video from a neighborhood park as their only lead to finding the children’s whereabouts.

The BAU team investigates a series of seemingly random fatal explosions throughout Kentucky and Tennessee.

Prentiss and J.J. are faced with important decisions to make about their futures as the BAU travels to Beaumont, Texas to investigate a series of murdered businessmen.