Season Four averaged 14.95 million viewers and 5.2 ratings points in the A18-49 demo on CBS.
- Joe Mantegna - David Rossi
- Thomas Gibson - Aaron Hotchner
- Paget Brewster - Emily Prentiss
- Shemar Moore - Derek Morgan
- Matthew Gray Gubler - Dr. Spencer Reid
- A.J. Cook - Jennifer Jareau
- Kirsten Vangsness - Penelope Garcia
|Image||Title||Airdate||Writer||Director||Season Episode||Series Episode|
|"Mayhem"||September 24, 2008||Simon Mirren||Edward Allen Bernero||1||66|
|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"||October 1, 2008||Jay Beattie and Dan Dworkin||Glenn Kershaw||2||67|
|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"||October 8, 2008||Andrew Wilder||Felix Enriquez Alcalá||3||68|
|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"||October 22, 2008||Debra J. Fisher and Erica Messer||John E. Gallagher||4||69|
|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"||October 29, 2008||Oanh Ly||Charles Haid||5||70|
|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"||November 5, 2008||Chris Mundy||Rob Spera||6||71|
|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"||November 12, 2008||Jay Beattie and Dan Dworkin||Guy Norman Bee||7||72|
|As Reid's investigation of a young boy's murder in Las Vegas continues, he discovers possible connections to his own past.|
|"Masterpiece"||November 19, 2008||Edward Allen Bernero||Paul Michael Glaser||8||73|
|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"||November 26, 2008||Breen Fazier||Bobby Roth||9||74|
|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"||December 10, 2008||Holly Harold||Glenn Kershaw||10||75|
|As a former uniform cop, Morgan takes it personally when a serial killer specifically targets officers on the police force in Phoenix, Arizona.|
|"Normal"||December 17, 2008||Andrew Wilder||Steve Boyum||11||76|
|The BAU is called to assist local law enforcement in catching a spree killer, dubbed the "Road Warrior" by the media, who is shooting blonde women as they drive along freeways in Orange County, California. The case is complicated because the heinous acts appear to be at random and the shooter is described as looking normal. Meanwhile, JJ brings her new baby to the BAU headquarters to introduce him to the team.|
|"Soul Mates"||January 14, 2009||Debra J. Fisher and Erica Messer||John E. Gallagher||12||77|
|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 serial killer.|
|"Bloodline"||January 21, 2009||Mark Linehan Bruner||Tim Matheson||13||78|
|The BAU is called to Alabama when young women are being abducted by what appears to be a family working together.|
|"Cold Comfort"||February 11, 2009||Jay Beattie and Dan Dworkin||Anna Foerster||14||79|
|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"||February 18, 2009||Oanh Ly||Charles S. Carroll||15||80|
|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"||February 25, 2009||Breen Frazier||Gwyneth Horder-Payton||16||81|
|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"||March 11, 2009||Chris Mundy||Edward Allen Bernero||17||82|
|The BAU investigates a series of deaths involving possible exorcisms in the Washington area that appear to be sanctioned by the Vatican, and Prentiss finds herself personally involved in the case.|
|"Omnivore"||March 18, 2009||Andrew Wilder||Nelson McCormick||18||83|
|The BAU travels to Boston when the serial killer from one of Hotch's first cases, which involved one of the most notorious murderers in the history of New England, returns after ten years.|
|"House on Fire"||March 25, 2009||Holly Harold||Felix Enriquez Alcalá||19||84|
|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.|
|"Conflicted"||April 8, 2009||Rick Dunkle||Jason Alexander||20||85|
|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"||April 22, 2009||Debra J. Fisher and Erica Messer||Karen Gaviola||21||86|
|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"||April 29, 2009||Simon Mirren||Rob Hardy||22||87|
|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"||May 6, 2009||Jay Beattie and Dan Dworkin||Steve Boyum||23||88|
|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"||May 13, 2009||Oanh Ly||John E. Gallagher||24||89|
|The BAU responds quickly after a homegrown terrorist 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..."||May 20, 2009||Chris Mundy||Charles Haid||25||90|
|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"||May 20, 2009||Edward Allen Bernero||Edward Allen Bernero||26||91|
|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.|
Season Four begins with the aftermath of the Season Three cliffhanger involving a group of terrorists. On a personal level, JJ gives birth and goes on maternity leave and has Jordan Todd take her position until she returns, Reid works a case that takes him back to his childhood, and on the season finale Hotch has another encounter with The Reaper.
DVD Special FeaturesEdit
Working the Scene:
- Blow Up! - Ep 401 "Mayhem"
- Truckin' - Ep 404 "Paradise"
- Night Train - Ep 406 "Catching Out"
- Master Class - Ep 408 "Masterpiece"
- Fight Club - Ep 410 "Brothers in Arms"
- Riding Shotgun - Ep 411 "Normal"
- Bus Stop - Ep 418 "Omnivore"
- Burn Baby Burn - Ep 419 "House on Fire"
- Transformation - Ep 420 "Conflicted"
- Vincent - 422 "The Big Wheel"
- Pig Farm - Ep 425-426 "To Hell... And Back"
- Profile: Rossi
- Rossi's Reprise
- Profile: Hotchner
- Murder is my Business
- Profile: Prentiss
- Angels & Demons
- Profile: Morgan
- Hero in Action
- Profile: Reid
- Instinct & Memory
- Profile: Jareau
- Mother Knows Best
- Profile: Garcia
- Girl on Fire