When Reid discovers that his girlfriend has been kidnapped by her stalker, he and the BAU team band together to find her before it's too late.
The BAU heads south to investigate a fast-moving UnSub whose signature matches that of a serial killer from 30 years ago. Also, the team learns that someone is tracking their cases and replicating crimes the BAU is solving.
The BAU investigates a series of male bodies that have been oddly disposed of, finding themselves in search of a killer with ritualistic tendencies. Also, Reid gets anxious when faced with the possibility of meeting his mystery woman. Series star Matthew Gray Gubler directs the episode.
When a recent attendee at a popular motivational speaker's conference in Seattle is murdered, the BAU looks at the speaker as the main suspect, but they have to refocus their investigation when the speaker himself goes missing. Also, Garcia is puzzled when Morgan declines to attend a dinner honoring an old family friend.
The BAU team goes in pursuit of a missing school bus full of children outside the Washington, D.C. area, and it becomes a race against time for them to bring them home safely. Andrew James Allen and David Gallagher guest star as brothers Josh and Matt Moore, and Reggie Hayes as Detective William Richards.
The BAU travels to Santa Monica when burned bodies of homeless people begin showing up by the famous pier. Also, Rossi reconnects with his former Marine sergeant from Vietnam (Meshach Taylor).
When prostitutes in Miami are discovered murdered in a similar style to local animals found dead there, the BAU must work fast to find an UnSub whose confidence is quickly escalating. Also, Morgan tries to increase Reid's athletic skills by convincing him to join the bureau softball team. Matthew Lillard guest stars as David Roy Turner.
When four men go missing in rural Oregon, the BAU searches for a common link among them in order to track them down. Also, JJ gets upset when her son Henry doesn't want to celebrate Halloween this year. Anne Dudek guest stars as Farmer Emma Kerrigan.
When a legless body is found in the New Mexico desert and a second unwilling amputee shows up at the hospital, the BAU team searches for this amateur surgeon before he preys upon his next reluctant victim. Also, Reid's phone calls to a mystery woman have the team intrigued. Ray Wise guest stars as Doctor John Nelson.
When one Kansas family turns up dead and another goes missing, the BAU looks for a link between the cases to find out who is behind the kidnappings and murders. Also, Hotch gets surprising news from Beth.
When the bodies of two seemingly unrelated victims are found just hours apart in San Diego and Los Angeles respectively, the BAU suspects that that not one, but two killers are working together to commit these murders. Guest Stars include Mackenzie Phillips and Kim Wayans.
When a Texas prisoner escapes during a transfer, he leaves behind victims with his unique trademark, sewing their mouths shut, a signature the BAU remembers as unique to the UnSub "The Silencer." While they investigate who he was and who he's become, the BAU also gets to know the newest member of the team.
Season eight begins with Alex Blake's (Jeanne Tripplehorn) first case with the BAU, in which the team travels to Texas after an ambulance carrying an UnSub known as "The Silencer" overturns on a highway. In their subsequent cases, the BAU travels to the West Coast after the bodies of two unrelated victims are dragged to their deaths behind cars, and the team struggles to find a link between four men who go missing. Meanwhile, Reid's personal and professional life collide as he becomes romantically attached to a scientist whom he only speaks to over the phone, but she may be harboring a dark secret.
When the BAU goes up against a gang of serial-killing bank robbers in Washington, D.C., the team tries to negotiate the situation unfolding inside the bank, but the stakes rise when one of their own becomes a hostages. (Guest stars include Josh Randall, Tricia Helfer, Evan Jones, Jayne Atkinson, Josh Stewart, Nicholas Brendon and Sebastian Roche)
Rossi and the team present one of the longest-tenured serial killer cases to college students, and they take the class through a nearly 20-year chase for the murderer. Mackenzie Astin guest stars.
After a notorious serial killer is executed, a copycat begins murdering women in the same Oklahoma town and in the same fashion. The BAU team must act fast before more victims are found.
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