The BAU investigates when several federal government employees, including a close friend of Walker's, succumb to symptoms of a heart attack Reid anxiously awaits his trial date.
The BAU is called to investigate after three victims are discovered tied to stakes in the brutal Arizona desert.
When a BAU member gets in trouble in Mexico, the team enlists the services of the International Response Team for help.
The BAU team is called in to investigate when male bodies are discovered that seem to be impossible to identify.
The BAU investigates when a bizarre hieroglyph is found under a deceased homeless man's armpit Reid decides to take his mother out of a clinical study early to bring her home.
The team investigates when home invasions involving casualties strike upscale neighborhoods in San Diego.
While conducting a profiling course on his birthday, Rossi gets a call from serial killer Tommy Yates, who gives him the location of his latest victim.
The BAU team investigates when the remains of a dozen people are discovered along a creek bed in Yakima, Wash.
Toby tries to help the sister of a shooting victim find out who killed her brother.
When the remains of an escaped convict are found in the sewer, the investigation reveals the man died in prison Brennan gives birth in unconventional circumstances.
After a cryptic message written in human blood is found at a national monument, the team ends up embarking on a scavenger hunt Brennan and Booth search for their perfect family home.
The team suspects murder when a storm chaser is killed while filming a tornado Booth becomes increasingly protective of Brennan.
After dismembered remains are found in multiple mailing boxes, the team uncovers a complicated love triangle Booth's grandfather reveals surprising news Special Agent Genny Shaw (Tina Majorino) learns how important teamwork is.
Booth and Sweets are given access to a toy company's headquarters after an executive's remains are found packaged with a Prince Charming doll Sweets prepares for his gun certification test Brennan worries about motherhood.
The team identifies the remains of a competitive-eating champion just days before a contest a brilliant new squint has trouble fitting in Booth and Brennan try to put themselves in each other's places after a disagreement about the baby.
A woman's remains are found in a paintball field Booth and Brennan adjust to life as an expectant couple.
A wealthy family uses their power and influence to distance themselves from a rape and murder investigation.
Horatio and Megan examine the remains of a human torso found in a tiger shark's stomach. Wanda De Jesus guest stars.
Horatio sets out on a personal mission to find his mentor's killer, and Megan worries that he has become too emotionally involved in the case.
The team searches for evidence and survivors after a jet crashes into the Everglades, trying to recreate what transpired on the fatal flight.