A case involving a serial killer believed to be copying Jack the Ripper takes Gideon to New Orleans after three victims are found with their throats cut. Once thought to have been killed in Hurricane Katrina, the discovery of a fourth victim in the French Quarter confirms the murderer is still alive. All the evidence and files had been lost in the flood, so the only clue the team has is the word "Jones" that the lead detective wrote on the wall just before he drowned. Meanwhile, Reid meets up with an old rival as he continues to struggle with the aftermath of being held hostage.

The BAU is called to Miami to investigate a serial killer who appears to have a conflicted sexual identity.

The BAU faces one of its toughest cases when the team is called to New York City to determine if a series of random shootings is the work of one serial killer or a team of killers working together.

As Reid's investigation of a young boy's murder in Las Vegas continues, he discovers possible connections to his own past.

The BAU team races to help Hotchner find The Reaper and save his family before it's too late.

The team needs to reunite in order to solve a home invasion case, while Agent Hotchner may have to leave the team.

When a series of tornadoes hits Kansas, the BAU is called in to investigate bodies of young boys that turn up in the aftermath of the storms. Also, work pressures cause tension on JJ's home front.

When the BAU goes up against a gang of serial-killing bank robbers in Washington, D.C., the team tries to negotiate the situation unfolding inside the bank, but the stakes rise when one of their own becomes a hostage.

As the BAU team continues to pursue the bank-robbing serial killers, the team determines that the suspects have a bigger target in the Nation's capital, and with one of the team still a hostage, they must work quickly to diffuse an explosive situation. Also, wedding bells ring for one of the BAU, and Prentiss ponders her future.

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.

When JJ is kidnapped, the BAU delves into her time at the State Department to find clues to her disappearance and uncover a secret mission that now puts her life in danger. To help with their search for JJ, the team calls upon Prentiss to help in the crisis

The BAU is shocked when Hotch is apprehended by a SWAT team and suspected of conspiracy, and as the team scrambles to prove his innocence, they suspect a larger plot is on the horizon.

When JJ arrives home shaken after a rough case, she breaks down and tells her husband about the abduction of two children.

In the wake of a devastating attack, the BAU works with former International Response Team member Matthew Simmons to save one of their own from escaped serial killer Peter Lewis.

The BAU investigates a spooky local ghost story of the 'Tall Man' and the clues it provides when two people go missing in the woods of East Allegheny’s Dead Man’s Conservatory, and a third mysteriously surfaces the following day with limited details as to what happened to her friends. To assist with the case, JJ reluctantly returns to her hometown, triggering emotional flashbacks to age 11 and her older sister’s tragic death.

Wedding bells are ringing as Rossi prepares to marry Krystall. But first, the BAU team travels to Los Angeles to investigate a series of fatal shootings in broad daylight following car accidents.

The BAU team investigates an UnSub with striking similarities to Rossi’s latest obsession, “The Chameleon,” a.k.a. Everett Lynch, who nearly killed him and then disappeared.

Following an explosive face-to-face encounter with Everett Lynch, a.k.a. “The Chameleon,” Dr. Reid suffers from a brain injury and, while experiencing hallucinations, is visited by ghosts from his past. Also, the BAU makes a shocking discovery about Lynch that affects Rossi personally, and the entire BAU team comes together to celebrate Rossi’s retirement.

When a family annihilator abducts a teen girl, the Behavioral Analysis Unit works the case on either side of the country to save her. But an unlikely connection to a mysterious kit leads to a bigger investigation and at the center of it is Penelope Garcia.

As the team hunts an UnSub who severs spinal cords, they uncover a clue from their last case that points to a serial killing network. To figure out how big this network is, Rossi has to convince a reluctant Garcia to do the one thing she doesn’t want: come back to the BAU.

The BAU hunts for the next connection to the serial killer network when they pursue a home invasion team. Alvez and Garcia convince Tyler Green to submit a cognitive interview to unlock his memories of Sicarius.

A surprising connection forces Deputy Director Bailey to ask the BAU to take a case involving young D.C. socialites who are bitten by a sadistic UnSub. But when the case turns political, the BAU finds themselves in the crosshairs from a high-powered senator. The team is led to a second shipping container that’s rigged to blow.

The explosion looks to have exposed the true mastermind behind Sicarius, but all is not what it seems. Is someone taking the fall for these deadly actions? The BAU is determined to seek the truth.

With the fate of the Sicarius investigation hanging in the balance, the BAU takes a case in West Virginia, where an UnSub practices his own twisted form of Old Testament vengeance.

Voit’s internal struggles with himself lead him to a desperate kidnapping. But Rossi’s obsession brings the BAU closer to the truth than they’ve ever been.

Rossi will go to any lengths to prove that Elias Voit is Sicarius. But Voit turns Rossi into his own worst enemy, putting his future at the BAU in jeopardy.

With Rossi in Voit’s clutches, he grapples with the limits of his technical know-how and mental strength. As the BAU tightens their grip on Voit, he reveals just how far he’s willing to take his deadly crusade.