Beckett is recruited to assist on a Narcotics investigation, but a routine mission turns deadly when an undercover operation goes awry. To survive, Beckett must engage in a battle of wits against some of the most dangerous men in the New York underworld.

When successful businessmen in Detroit are targeted by an anger-driven power-assertive Unsub, the BAU is called in to investigate.

When Garcia experiences anxiety over a case that's personal to her from her past, Morgan visits to lend emotional support.

When an UnSub in Miami sensationalizes his crimes by giving the local media exclusive footage, the BAU is called in to investigate.

When a guilt-ridden young woman confesses to the murder of a struggling actor - knowing details only the killer could know - Beckett and Castle seem to have an open-and-shut case, until they uncover proof that their suspect couldn't possibly be the killer.

When a Japanese ballet dancer is mysteriously murdered, Castle and Beckett's investigation into her secret life uncovers evidence that she was killed by a ninja, and now that ninja is coming after them.

A BMX rider's remains are discovered on the roof of a warehouse after a failed bike stunt. Sweets turns to Booth for advice about his relationship with Daisy and Booth makes a decision about his relationship with Hannah.

The liquefied remains of a wedding planner are found in her home tanning bed on Valentine's Day, and Cam pressures her team to solve the case in time so she can celebrate the holiday with her boyfriend.

The BAU investigates a workplace shooting committed by a state-of-the-art drone in Silicon Valley.

The BAU searches for an unsub in Austin, Texas who is targeting prominent members of the community.

When two members of a conspiracy group in Roswell, New Mexico perish in quick succession, the BAU is called to investigate.

While Harrow investigates a baffling crime involving siblings, James brings danger closer to his half-sister Fern than ever before - and pays a high price.

Harrow rides the storm when a deathly ill boy at QIFM needs his help at the very moment Mila Zoric summons him to negotiate his kidnapped son's release. But there's one lightning bolt shock he did not see coming.

A BMX rider's remains are discovered on the roof of a warehouse after a failed bike stunt. Sweets turns to Booth for advice about his relationship with Daisy and Booth makes a decision about his relationship with Hannah.

The liquefied remains of a wedding planner are found in her home tanning bed on Valentine's Day, and Cam pressures her team to solve the case in time so she can celebrate the holiday with her boyfriend.

When a model is murdered, Will and Faith dive into a twisted art-world conspiracy, aided by Ava, his former flame; Betty's instincts turn a routine neighborhood check for Ormewood, Angie and Nico into a critical lead on a dangerous case.

Colter is tasked with tracking down a “ghost” when hired to find a man who seemingly died in a car accident months earlier. Meanwhile, Colter catches a break in his white whale case.

While Harrow investigates a baffling crime involving siblings, James brings danger closer to his half-sister Fern than ever before - and pays a high price.

When a murder investigation reveals there's more to the story than meets the eye, Special Agent Will Trent relies on his keen instincts and unique experience to uncover the truth.

As the GBI continues its investigation on a missing girl, Will becomes frustrated with the suspect search; Angie is forced to evaluate her current relationships as she follows a new case with Ormewood.

Will and Faith's investigation into a small-town murder has large implications when a connection is drawn to a cold case; the death of a security guard perplexes Angie.