Episode Guide
Season 4
Episode Guide
Mayhem
S4
E1
As the city is on high alert, the team begins to believe that they have made a mistake with the profile and that everything the terrorists have done so far may in fact just have been diversion for something even bigger.
The Angel Maker
S4
E2
On the anniversary of a serial killer's execution, a murder spree which appears to be connected to him begins and the team must try and understand his mind in order to stop it.
Minimal Loss
S4
E3
Reid and Prentiss, having gone undercover into an underground cult to investigate child abuse, get trapped inside the compound when a federal raid on it goes bad.
Paradise
S4
E4
A serial killer targeting couples stages their bodies in a way to make their deaths look like car accidents.
Catching Out
S4
E5
A man is jumping trains along Highway 99, brutally killing couples in their homes whenever he stops.
The Instincts
S4
E6
A child abduction case in Las Vegas causes Reid to have strange nightmares which appear to be connected to an event in his past.
Memoriam
S4
E7
Driven by his nightmares, Reid stays behind in Las Vegas to find his father in order to find out the truth about Riley Jenkins' murder.
Masterpiece
S4
E8
A serial killer turns himself in and challenges the team to find five people he has hidden somewhere before they die.
52 Pickup
S4
E9
A greatly sadistic serial killer who disembowels women and forces them to clean it up before killing them proves difficult to catch thanks to his social charm and simple, yet clever, disguises.
Brothers in Arms
S4
E10
Morgan, an ex-cop, takes it personally when a serial killer targets police officers in Phoenix, Arizona.
Normal
S4
E11
A serial killer known as the Road Warrior is gunning down blonde women on roads in Orange County, California and the BAU suspect that the victims are surrogates and that it's only a matter of time before he kills the real one.
Soul Mates
S4
E12
The team suspects that a member of an affluent community is responsible for the disappearance of a young woman.
Bloodline
S4
E13
A family consisting of two parents and their son break into a home, kill the parents and kidnap their daughter. As the investigation proceeds, the BAU team begin to suspect that what they're dealing with is bigger than they thought.
Cold Comfort
S4
E14
A serial killer in the Olympia, Washington area has abducted four blonde, twenty-something women. When the third victim is found embalmed, the BAU are called in and suspect that the embalming is a way for him to spend more time with them.
Zoe's Reprise
S4
E15
A copycat serial killer is recreating murder techniques used by famous killers from the past.
Pleasure Is My Business
S4
E16
A high priced call girl that is killing her clients must be found and stopped.
Demonology
S4
E17
Prentiss learns from an old friend, John Cooley, that their mutual friend, Matthew Benton, just died from a heart attack. Prentiss had not seen either man in several years, both for different reasons.
Omnivore
S4
E18
After being inactive for 10 years, Hotch's first BAU case, an elusive serial killer known as the Reaper, starts killing again.
House on Fire
S4
E19
When the kill count of a mass-murdering arsonist active in a small town reaches 31, the BAU are called in.
Conflicted
S4
E20
Male college students on spring break are being raped and murdered, presumably by a man and a woman working together. The BAU are called in and suspect a shy hotel cleaner and a receptionist.
A Shade of Gray
S4
E21
An AMBER alert is activated for a young boy in Cherry Hill, New Jersey and the BAU suspect it to be the work of a pedophile who has abducted and killed two other boys.
The Big Wheel
S4
E22
The team tracks down a highly obsessive-compulsive killer who targets blonde women and leaves messages to the police asking them to stop him.
Roadkill
S4
E23
A serial killer in Bend, Oregon is deliberately killing people by running them over with his car.
Amplification
S4
E24
The BAU works with the U.S. Army to find the perpetrator behind an anthrax attack on a park in Annapolis, Maryland.
To Hell...
S4
E25
The team head to Canada to investigate the disappearances of a number of homeless people, drug users and sex workers and uncover something horrific in part one of the season finale.
...And Back
S4
E26
The team head to Canada to investigate the disappearances of a number of homeless people, drug users and sex workers and uncover something horrific in part two of the season finale.