The Best Episodes Written By Chris Mundy

While Wendy battles personal demons, Marty struggles to keep their lives from falling apart. Darlene does Ruth a favor.

John finds evidence that refutes his alibi. Eric makes a remark that catches Marco's attention. Meg must decide whom to protect: Marco or her family.

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

During his next sermon, Mason falters. Wendy and the kids are caught trying to flee their home. Marty brokers a deal between Jacob and Del.

Marty makes plans without telling Wendy. Darlene sends a message via Jonah. Wyatt learns the truth about his dad. Ruth realizes Cade must be stopped.

In this conclusion of a special two-part episode, finding the serial killer becomes critical to the BAU when the team realizes Reid is being held captive and a live feed of him being tortured is shown on the internet. Meanwhile, Reid's troubled childhood is revealed in flashback sequences as he drifts in and out of consciousness.

The team investigates a serial killer who is targeting women at a small college in Flagstaff, Arizona. The BAU shuts down the campus, creates a detailed profile of the unsub, and arrests a suspect. However, the team members begin to have doubts about themselves when another woman is killed while the suspect is in custody.

The team re-opens the case of Matthew Adams, a teen-aged cult member who apparently committed suicide back in 1978, when his sister comes forth with new evidence about the deprogrammer her family hired to rescue her brother.

As a team member fights for life, the BAU continues the search for an attacker that leads the unit to believe the assailant could be someone close to the investigation.

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.

In Milwaukee, a series of women have been found murdered with their hearts crudely removed. The BAU is assigned to the case, but they are short three members: Gideon, who is missing, Hotch, who is on suspension and Prentiss, who resigns her commission to join the Foreign Service. Supervisor Strauss steps in as lead, but she doesn't handle herself well in the field.

The BAU tracks a serial killer who chooses junkies, prostitutes and the homeless off the streets of Detroit as his victims and takes them across the border into Canada, and an agent's life is in peril.

Marty is pressured to move money ahead of schedule, Wendy pitches a high-stakes plan, Wyatt lives the good life, and Ruth butts heads in the casino.

Marty and Wendy wrestle with a problematic offer. Ruth goes out on her own, Jonah rebels, and Omar's nephew makes his presence known.

Lilly returns to her last case before joining the Cold Case Squad as she re-investigates the brutal triple homicide of a restaurant owner and his family, murdered in the restaurant bathroom in 2003. Also the other team member have personal reasons to closing the case; Jeffries grew up in the predominantly black neighborhood while Vera was the one assigned to the case when Det. Rush left.

As Rossi, Morgan and JJ profile a killer who is targeting an emergency room doctor, Prentiss realizes that Hotch is missing.

The BAU is called to investigate a series of murders of prostitutes in Washington D.C. and Reid suspects a teenager he met asking for his help is guilty of the crimes. The case becomes complicated when a congresswoman, who about to make a speech to praise the city's lower crime rate, threatens to take away the case if Hotchner calls a press conference to discuss it.

While investigating the abduction of a young boy in Las Vegas, Dr. Reid starts to have dreams that might help reveal buried memories from his childhood.

Devastated by a tremendous loss, Ruth heads to Chicago to enact revenge as Marty tries to talk her out of doing something she may regret.

A tragedy leads Cullen to defuse an internal threat to the railroad.

A new arrival stirs things up in Hell on Wheels, while Eva gets caught between Elam and Mr. Toole.

Ruth's dad gets out of jail. Approval for a riverboat casino calls for Wendy's political skills. The Mexican cartel demands reparations from the Snells.

The BAU unit travels to NYC to investigate a series of murders that appears to have been committed by a vigilante conducting revenge on former criminals who have been released by the justice system.

A group of suspects with a pack mentality who kill for the thrill of it are the subjects of a BAU manhunt.

The BAU investigates a serial rapist who had been attacking young women at religious schools and stopped for six weeks. He has resumed his attacks, but is now targeting a different demographic of women. Elle makes a decision that could end her career with the BAU.