As Hotch fights for his life due to complications from his stabbing at the hands of George Foyet, a.k.a. “The Reaper,” he experiences visions of his late wife, Haley, and his nemesis, Foyet.

With Richard's help, Catherine discovers she can travel to another world; a new revelation puts Martha's loyalties to the test; Zoe breaks Bill out of prison.

Tom grapples with a betrayal and encounters a familiar face; Catherine looks for a solution to the dangers of the black hole.

Lou, feeling like M.O.D.O.K. is stifling his individuality ahead of his bar mitzvah, jumps into M.O.D.O.K.’s portal to Asgard. There, Lou is taken by a tribe of goblins known as Kobolds, but wins them over with his magic tricks and becomes their leader. He refuses to go back home with his dad, so M.O.D.O.K. takes control of an army of Asgardian warriors and wages war against his son. Eventually, M.O.D.O.K. and Lou strike a deal and use Lou's magic tricks to pacify the Kobolds. Meanwhile, the Super Adaptoid agrees to help young M.O.D.O.K.

Trying to emulate human males, Korvo and Terry create their own man cave and “"P.A.T.R.I.C.I.A.", a robot based on female sitcom characters, programmed to hate the man cave. Korvo and Terry realize the robot fulfills their respective desires for a nagging wife and a nurturing mother, and invite her inside the man cave. Torn between her conflicting directives, P.A.T.R.I.C.I.A. transforms into a heavily-armed killing machine and destroys every man cave in the neighborhood. Ms. Perez, Jesse's gender studies teacher, assigns the class to challenge a glass ceiling. Jesse confronts several school extracurriculars, but is disappointed to learn they already welcome women.

Threatened with expulsion, Yumyulack and Jesse continue to attend their empty high school after the school year ends. Unaware of the summer break, they believe they are being tested, and attempt to teach each other. They realize their mistake and wreak havoc on the school, and are bribed with straight As after discovering Principal Cooke and Mrs. Frankie having sex in the cafeteria. Korvo and Terry enroll in a junior college, but Terry shoots Korvo with a raygun that makes him dumber. Korvo joins Terry's hard-partying college experience, but accidentally causes the "ice lava" that powers their spaceship to flood the city, freezing everyone in its path.

With Richard's help, Catherine discovers she can travel to another world; a new revelation puts Martha's loyalties to the test; Zoe breaks Bill out of prison.

Tom grapples with a betrayal and encounters a familiar face; Catherine looks for a solution to the dangers of the black hole.

Athena's only chance of surviving and saving everyone on the flight is to attempt to land the plane before it crashes and call on the 118 for help.

When it finally looks like Hen and Karen may get their foster license back, they are hit with another obstacle; the 118 races to the aid of a cheerleader involved in an infield collision.

The 118 is once again working on the spookiest night of the year and missing out on all the tricks and treats; Buck's Halloween decorations become a little scarier than he had hoped.

In the first part of the two episode season finale, the BAU is called in to investigate a string of deaths in Manhattan tied to apparent ecstasy overdoses, and Hotch discovers that his estranged brother, Sean, is caught in the middle.

The Replicator zeroes in on the BAU when the killer targets one of the team as the next victim. The team must now struggle against his endgame as the stakes grow higher.

When a priceless work of art is stolen and its transporter murdered, Castle and Beckett must work with the key witness to track down the painting and sniff out the killer

Detective Slaughter returns to enlist Castle's help in solving a high-stakes robbery case. But when a body is found linked to the crime, Slaughter becomes the number one suspect in the heist turned murder, while Castle has to determine whether he's guilty or help to prove he's innocent

In order to hunt down the brutal murderer of a grifting seducer, Castle and Beckett must investigate New York's elite. Meanwhile, Castle plans to surprise Beckett on their one-year wedding anniversary.

The hunt for a methodical killer takes the BAU to Arizona to search for an increasingly devolving UnSub, and the team speculates that Hotch is in the running to be the new BAU unit chief.

As the BAU zeroes in on the suspect of the ritualistic killings they’ve been investigating in Arizona, a bizarre connection within the UnSub’s family could lead them to finally nab the suspect.

Angela’s psychic friend is enlisted when the body of a local psychic is found.

The team are called in after a wealthy teacher is discovered dead in an abandoned bookstore.

Castle and Beckett investigate the murder of a cruise ship entertainer, only to find themselves trapped at sea with the killer.

When a body is found in the theater of Martha's latest show, Castle and Beckett's investigation leads them into the unexpectedly dangerous world of competitive a capella.

Will reunites with a long-lost relative, uncovering unexpected and profound similarities; the GBI and APD investigate a judge's murder; Faith's connection with Luke deepens.

Will accompanies Faith to a wedding alongside her son Jeremy, which becomes far from celebratory when a body and a group of gunmen are found in the venue's basement; Angie and Ormewood grow wary of Crystal's behavior at work.

When a priceless work of art is stolen and its transporter murdered, Castle and Beckett must work with the key witness to track down the painting and sniff out the killer

Detective Slaughter returns to enlist Castle's help in solving a high-stakes robbery case. But when a body is found linked to the crime, Slaughter becomes the number one suspect in the heist turned murder, while Castle has to determine whether he's guilty or help to prove he's innocent

The team take a look at a local bakery after the body of an ex-con is discovered in pieces.

A chilling suburban murder pushes Will and Faith into the mind of a meticulous killer; Paul Campano threatens to unravel both the case and Will's inner balance.

In the first part of the two episode season finale, the BAU is called in to investigate a string of deaths in Manhattan tied to apparent ecstasy overdoses, and Hotch discovers that his estranged brother, Sean, is caught in the middle.

The Replicator zeroes in on the BAU when the killer targets one of the team as the next victim. The team must now struggle against his endgame as the stakes grow higher.

Angela’s psychic friend is enlisted when the body of a local psychic is found.

The team are called in after a wealthy teacher is discovered dead in an abandoned bookstore.

Will, Faith and Angie find themselves embroiled in a series of cases where a similar marker links the murders of several sex offenders; Angie grapples with an unexpected proposition from Amanda.

When the BAU investigates victims of possible ritualistic murders in Utah, clues lead them to believe that the UnSub they are looking for might have a fascination with the Salem Witch Trials.

After a series of strangulations in Boston, the BAU looks for an UnSub who likes to keep mementos of the victims, and the team wonders if a common link to the casualties could lead them to the culprit.