The 118 race to the rescue to a renaissance faire; then an office bldg. when an overbearing boss is poisoned; Athena fears for May’s life when she encounters a disturbed young man; Uncle Buck babysits young Jee-Yun as Maddie and Chimney begin house-hunting; Eddie and Carla prepare Christopher for his first school dance.

At the university, Sophia watches the videos recorded by Dylan, a young man they found dead, while Catherine focuses on the algorithms he left behind and which decipher the behavior of robots. Thanks to Bill's intervention, Isla manages to flee and join her family.

Emily agrees to help Bill test her for the virus, but soon experiences serious side effects. Sacha, who has secretly followed the group to stay close to Emily, tries to remove her from the group. For their part, Catherine, Sophia and Nathan set out again in search of Bill Ward.

Korvo tries to get the family involved in repairing the spaceship, but they attend a birthday party instead, where he is inspired to become a magician. Using his computer system Aisha, Korvo creates a technologically advanced magic act; he goes viral and prepares for a Las Vegas show, which will culminate in him leaping through a black hole. Korvo ignores his family's warning that jealous magicians plan to kill him; the family save him from being shot, but he dies when the black hole trick goes awry. The grieving family agree to repair the ship in Korvo's memory, and he reappears, having faked his death to bring them closer together. Yumyulack adds a woman named Cherie to his shrunken collection.

Lou's bar mitzvah doesn't attract many guests, so M.O.D.O.K. is forced to invite the villains and creatures he’s met along the season. Young M.O.D.O.K. attacks and puts the family in a precarious situation before taking M.O.D.O.K. into the time stream. Young M.O.D.O.K. reveals that if M.O.D.O.K. truly wants to take over the world, his family has to die. M.O.D.O.K. is forced to make the toughest decision of his life.

At the university, Sophia watches the videos recorded by Dylan, a young man they found dead, while Catherine focuses on the algorithms he left behind and which decipher the behavior of robots. Thanks to Bill's intervention, Isla manages to flee and join her family.

Emily agrees to help Bill test her for the virus, but soon experiences serious side effects. Sacha, who has secretly followed the group to stay close to Emily, tries to remove her from the group. For their part, Catherine, Sophia and Nathan set out again in search of Bill Ward.

The BAU believes two unsubs may be operating at the same time, when victims killed in two drastically different ways are discovered in the same city. Also, the team grapples with keeping Reid safe in prison.

Continuing from the season premiere episode, Beckett races against time to find a stolen toxin capable of killing tens of thousands of people. To make matters worse, Castle was exposed, leaving him with less than 24 hours to live.

The BAU investigates an urban vampire in New York who kidnaps his victims at night and holds them underground in the sewer system. Also, Reid makes an impossible decision in prison that severely affects himself and other inmates.

With Beckett still in D.C., Castle and the boys investigate the murder of former child star Charlie Reynolds, who rose to fame playing the lovable nerd on an early 90s High School sitcom.

R.J. takes on a strange case following a grocery store robbery gone wrong; Emi's loyalty is tested when her father's misdeeds come to light.

Athena and the 118 race to the rescue when a fading movie star is plagued by a series of near death experiences.

The body of a brilliant and career-driven surgeon is found in a rough neighborhood with multiple fractures in her skull and no indication as to how or why she was there.

The BAU believes two unsubs may be operating at the same time, when victims killed in two drastically different ways are discovered in the same city. Also, the team grapples with keeping Reid safe in prison.

The BAU investigates an urban vampire in New York who kidnaps his victims at night and holds them underground in the sewer system. Also, Reid makes an impossible decision in prison that severely affects himself and other inmates.

As Harrow's attempts to reconnect with his son are frustrated, Fern and James grow closer - while the baffling deaths of two teens sharpen Harrow's concern for his own children.

R.J. takes on a strange case following a grocery store robbery gone wrong; Emi's loyalty is tested when her father's misdeeds come to light.

The 118 race to the rescue to a renaissance faire; then an office bldg. when an overbearing boss is poisoned; Athena fears for May’s life when she encounters a disturbed young man; Uncle Buck babysits young Jee-Yun as Maddie and Chimney begin house-hunting; Eddie and Carla prepare Christopher for his first school dance.

A grisly murder investigation leads Castle and Beckett to a suspect who claims he's traveled back in time to stop terrible events from unfolding.

An unidentifiable body is discovered in the shower of an upscale home belonging to a young female socialite.

Castle and Beckett investigate the bizarre murder of a young woman who was found ritually posed. When the team finds a collection of strange symbols in her apartment, Castle becomes convinced they’ve stumbled onto a 'Da Vinci Code' style conspiracy.

The BAU is called after three victims are found tied to stakes in the Arizona desert.

When several federal government employees, including a close friend of Walker's, succumb to symptoms of a heart attack, the BAU investigates. Also, Reid anxiously awaits his trial date.

While pressure mounts on Harrow to stop defending his son James, two baffling deaths demand all his wit and courage to solve - before another life is lost.

Will disappears after an attack, prompting the team to search, while he's trapped and trying to escape, complicating his complex relationship with Angie.

R.J. takes on a strange case following a grocery store robbery gone wrong; Emi's loyalty is tested when her father's misdeeds come to light.

A grisly murder investigation leads Castle and Beckett to a suspect who claims he's traveled back in time to stop terrible events from unfolding.

While pressure mounts on Harrow to stop defending his son James, two baffling deaths demand all his wit and courage to solve - before another life is lost.

When Reid fears his mother has been abducted, he asks the BAU to investigate while he's stuck in prison.

Ryan Murphy, Brad Falchuk and Tim Minear reimagine the procedural drama with "9-1-1." The series explores the high-pressure experiences of first responders -- including police officers, firefighters and dispatchers -- who are thrust into the most frightening, shocking and heart-stopping situations. These emergency responders must try to balance saving those who are at their most vulnerable with solving the problems in their own lives. The show draws from real-life, high-pressure experiences of first responders who regularly face heart-stopping situations that are often unpredictable, intense and uplifting at the same time.

Castle and Beckett work the murder case of a famed relationship therapist. At first it appears that client secrets may have been the motivating factor, but then a rare valuable object is discovered in the victim's possession.

Comes to the team with a lead that might help catch Mr. Scratch, the elusive fugitive that has been tormenting the team all season.