Owen makes a decision about his future; Tommy receives devastating news; T.K. and Carlos worry about adopting Jonah; Mateo gets his immigration status threatened after an altercation; a doomsday prepper gets trapped in a bomb shelter and The 126 and all of Austin brace for an asteroid crash.

London, four months after the attack. The survivors organize the Resistance. Bill continues his research on aliens and understands that their DNA is human but that their organs are degenerating. In France, a severely wounded dissident alien reaches the Observatory

At the Observatory, Mokrani and Catherine clash over the fate to be reserved for Micah, whom Catherine considers to be a major source of information. Micah reveals to Catherine that she has to find Bill Ward. The latter, for his part, tries to find out more about Emily, still assailed by visions of Adina, the leader of the aliens urging him to kill Bill.

After getting kicked out of the A-List villains' Soho Lair, M.O.D.O.K. decides to slum it at The Bar With No Name. There, he forms a crew of street-level baddies, intent on using them for a heist that will get him back into the Soho Lair. However, after a wild night of bonding and backstory sharing, they form a real camaraderie. Meanwhile, Jodie goes looking for M.O.D.O.K. at AIM and bonds with Monica while Lou meets Monica's daughter, Carmilla. College-aged M.O.D.O.K. has returned from the time stream and kidnaps the Super Adaptoid.

London, four months after the attack. The survivors organize the Resistance. Bill continues his research on aliens and understands that their DNA is human but that their organs are degenerating. In France, a severely wounded dissident alien reaches the Observatory

At the Observatory, Mokrani and Catherine clash over the fate to be reserved for Micah, whom Catherine considers to be a major source of information. Micah reveals to Catherine that she has to find Bill Ward. The latter, for his part, tries to find out more about Emily, still assailed by visions of Adina, the leader of the aliens urging him to kill Bill.

The BAU searches for a serial killer who leaves distinctive marks on victims' faces with the help of an impressive potential new team member, forensic psychologist Dr. Tara Lewis:

Old wounds are reopened when the retired lead detective on Beckett's mother's homicide case contacts her with new information, but then is gunned down right in front of Beckett before he can tell her what he knows.

When a Los Angeles bus is attacked with sarin gas, the BAU must act quickly to find the suspect before a larger-scale incident occurs.

The brutal murder of a lottery winner has Castle and Beckett up to their eyeballs in suspects. As the precinct buzzes with fantasies of what our cops would do if they won the lottery, Martha suddenly inherits money she feels she doesn not deserve.

A body is found with a diamond ring in his pocket at a bar. Longworth sifts through the sands of the various characters at the bar, revealing a complicated love triangle.

Judd literally walks straight into the line of fire when an armory catches on fire, sending bullets flying everywhere. Owen questions Judd’s pledge of sobriety. Marjan introduces her boyfriend Joe (guest star John Clarance Stewart) to her visiting parents, Waleed (Michael Benyaer) and Nasreen (Anne Nahabedian), but their dinner doesn’t go as smoothly as she hoped.

The team investigates the murder of an escape artist whose body is found in the woods. They discover that the victim worked at the Magic Palace, and had some secret activities in the works that might have made him enemies in the magic community. Meanwhile, Brennan and Booth poll their friends as to whether or not the tooth fairy should visit Christine, and Angela continues to work with Sebastian Kohl.

The BAU searches for a serial killer who leaves distinctive marks on victims' faces with the help of an impressive potential new team member, forensic psychologist Dr. Tara Lewis:

When a Los Angeles bus is attacked with sarin gas, the BAU must act quickly to find the suspect before a larger-scale incident occurs.

A woman's dismembered body is found on a railway track. Although suicide is suspected, Harrow is not so sure. Meanwhile, the river bones are returned, much to Harrow's dismay, and his troubles are only increased when Dass begins questioning him about Robert Quinn.

A body is found with a diamond ring in his pocket at a bar. Longworth sifts through the sands of the various characters at the bar, revealing a complicated love triangle.

Castle and Beckett find themselves on opposite sides of the case when Castle's old friend emerges as the prime suspect in his own wife's murder. As they work to solve the crime, Castle comes to realize that one of two terrible things must be true.

The team investigates the high-stakes murder of a political journalist who was found dead after recently publishing an article exposing corruption in the NSA. Due to the nature of the investigation, Hodgins' paranoia takes over as the team realizes their every move is being watched. Meanwhile, Brennan secretly tries to plan a surprise for Booth and the whole team celebrates Thanksgiving together.

Castle and Beckett investigate the apparent robbery-homicide of a New York cab driver, only to discover that the victim was involved in a mysterious conspiracy with unimaginable consequences.

Owen and the 126 deal with the aftermath of the asteroid crash in Austin while an even greater threat looms.

When brides-to-be in Savannah are killed on the eve of their nuptials, the BAU suspects a jilted UnSub is at work.

When three restaurant workers are killed in a robbery/homicide in Las Vegas, N.M., the BAU looks at a cold case that happened in the town six years ago for leads.

Dass and Nichols are closing in on the truth with the discovery of Quinn's car. Meanwhile, Harrow investigates the death of a mother and son in a head-on collision.

Colter and rival rewardist Billie Matalon team up to find a missing high school baseball star.

A body is found with a diamond ring in his pocket at a bar. Longworth sifts through the sands of the various characters at the bar, revealing a complicated love triangle.

Castle and Beckett find themselves on opposite sides of the case when Castle's old friend emerges as the prime suspect in his own wife's murder. As they work to solve the crime, Castle comes to realize that one of two terrible things must be true.

Dass and Nichols are closing in on the truth with the discovery of Quinn's car. Meanwhile, Harrow investigates the death of a mother and son in a head-on collision.

To solve a murder, Brennan and Booth go undercover at an Old West-style shooting competition, while Angela and Hodgins discuss the future of their family and Cam gets close with photographer Sebastian Kohl (guest star Gil Darnell). Then, the team investigates the murder of a police officer that sends shockwaves through both the Jeffersonian and FBI teams. Behavioral analyst Leslie Green (guest star Sara Rue) is assigned to work with Booth on the investigation and lends her professional assessments on who the cop killer could be, while Cam must make some decisions in her personal life and the entire team re-evaluates what is truly important to them.

When the BAU investigates incidents of bodies being incorporated into macabre graffiti art in Detroit, they suspect an elusive-yet-notorious street artist could be the UnSub. Also, Dr. Lewis struggles to balance her relationship with her fiancé and her work.

Owen Strand, the lone survivor of his Manhattan firehouse on 9/11, takes his progressive philosophies of life and firefighting down to Austin, Texas, where he helps the firefighters of Firehouse 126 start anew.

When the head writer on one of New York's longest running soap operas is killed with a fire axe, Castle and Beckett quickly discover behind the scenes drama just as scandalous as the fictitious storylines, and most would kill to get ahead.

When a woman is murdered in a small town in Florida inhabited entirely by sex offenders, the BAU faces a community full of suspects. Also, Lewis receives a career opportunity that may take her away from the BAU.