Season 4

Episode Guide

Mayhem

S4 E1
Sep 24, 2008
After a bomb explodes an SUV in New York City that might be carrying a BAU member, the team goes into high gear to determine who might have been injured in the explosion and to apprehend the terrorists responsible for the mayhem.

The Angel Maker

S4 E2
Oct 01, 2008
After a series of murders in Lower Canaan, Ohio, is connected to a serial killer who had been executed a year ago, the BAU must find the link to the current crimes.

Minimal Loss

S4 E3
Oct 08, 2008
After Prentiss and Reid go undercover in Colorado to investigate alleged child abuse at the compound of an underground cult in La Plata County, they are taken hostage when a federal raid on the fortress goes bad.

Paradise

S4 E4
Oct 22, 2008
The BAU joins the manhunt in Sherwood, Nevada, to catch a serial killer who conceals the manner of his crimes by staging car accidents.

Catching Out

S4 E5
Oct 29, 2008
The BAU investigates a series of murders in Modesto that appear to be connected to a killer who jumps trains in Northern California and chooses his victims based on their proximity to the railway.

The Instincts

S4 E6
Nov 05, 2008
When a young boy is kidnapped in Las Vegas, Reid begins to have dreams that force him recall forgotten memories from his childhood as he investigates the case.

Memoriam

S4 E7
Nov 12, 2008
As Reid's investigation of a young boy's murder in Las Vegas continues, he discovers possible connections to his own past.

Masterpiece

S4 E8
Nov 19, 2008
When a narcissistic psychopath confesses he has killed seven people and more will die, the team must locate his latest victims before it is too late.

52 Pickup

S4 E9
Nov 26, 2008
Emily Prentiss and Jordan Todd go undercover in Atlanta to profile a serial killer who has perfected his skill as a pick-up artist and uses his masculine prowess to lure his next victims.

Brothers In Arms

S4 E10
Dec 10, 2008
As a former uniform cop, Morgan takes it personally when a serial killer specifically targets officers on the police force in Phoenix, Arizona.

Normal

S4 E11
Dec 17, 2008
The BAU is called to assist local law enforcement in catching a serial killer, dubbed the "Road Warrior" by the media, who is shooting blonde women as they drive along freeways in Orange County, California.

Soul Mates

S4 E12
Jan 14, 2009
When a young woman in an affluent community in Sarasota, Florida, disappears, the BAU suspects she may have been taken hostage by the partner of a pair of serial killers.

Bloodline

S4 E13
Jan 21, 2009
The BAU is called to Alabama when young women are being abducted by what appears to be a family working together.

Cold Comfort

S4 E14
Feb 11, 2009
The mother of an abducted child works with the BAU in Seattle to identify a serial killer who kidnaps, murders, and embalms his victims.

Zoe's Reprise

S4 E15
Feb 18, 2009
The local authorities in Cleveland enlist the help of the BAU to assist in the pursuit of a serial killer who appears to be copying the methods used by famous murderers from the past.

Pleasure Is My Business

S4 E16
Feb 25, 2009
The BAU is called to Dallas to investigate when a serial killer lures and kills high-powered executives by posing as a high-class call girl.

Demonology

S4 E17
Mar 11, 2009
The BAU investigates a series of deaths involving possible exorcisms in the Washington area that appear to be sanctioned by the Vatican, and SSA Emily Prentiss finds herself personally involved in the case.

Ominivore

S4 E18
Mar 18, 2009
The BAU travels to Boston when the serial killer from one of Agent Hotchner's first cases, which involved one of the most notorious murderers in the history of New England, returns after 10 years.

House On Fire

S4 E19
Mar 25, 2009
The BAU is summoned to Indiana by local authorities when a serial arsonist threatens the residents of Royal by setting fire to community meeting places that kills many people.

Conflicted

S4 E20
Apr 08, 2009
The BAU is called to Texas to investigate a serial killer who is targeting vacationing students on spring break on South Padre Island.

A Shade of Gray

S4 E21
Apr 22, 2009
During an investigation of a series of child abductions and murders in Cherry Hill, New Jersey, the BAU concludes the possibility that the last murder may not be the work of the suspect who had been apprehended.

The Big Wheel

S4 E22
Apr 29, 2009
When a serial killer in Buffalo sends a videotape of one of his crimes to the BAU, the team discovers a message from the murderer that begs for help in stopping the killing.

Roadkill

S4 E23
May 06, 2009
Local authorities summon the assistance of the BAU after a series of homicides occur that appear to have been caused by a serial killer's car near Bend, Oregon.

Amplification

S4 E24
May 13, 2009
The BAU responds quickly after a serial killer releases a new strain of a deadly anthrax virus in Annapolis that threatens the public and puts a member of the team at risk.

To Hell...

S4 E25
May 20, 2009
In one of its most difficult cases, the BAU is called to Detroit to help track down a serial killer who forces the team into Canada to catch him.

...And Back

S4 E26
May 20, 2009
The BAU continues its search for a serial killer who has forced the team into Canada to catch him. Meanwhile, a team member may have become the target of a killer from the past.