When a time capsule in a small Colorado town is opened 25 years later and contains a gruesome discovery, the BAU investigates that crime and a possible link to the death of a local police officer.

Cracks start to show as the survivors find different ways to cope. Jonathan’s increasingly perturbed by Sacha’s strange behaviour. Emily proves to be an exciting conundrum for Bill. And Mokrani is horrified as his men delight in the opportunity to exact revenge.

The alien’s connection to certain survivors raises difficult questions. Bill makes a startling discovery. Sacha’s behaviour is increasingly erratic. And Tom’s birthday proves cause for celebration. But at what cost?

Young M.O.D.O.K. has kidnapped the family and replaced them with robots that trick M.O.D.O.K. into thinking Jodie wants him back. M.O.D.O.K. learns the truth and goes to free his real family. The family meet up inside the carnival-themed arena Murderworld, where young M.O.D.O.K. and Arcade reveal that each family member has two robotic replicas and that they must fight to the death, unsure of who is real or fake. Jodie goes toe-to-toe with Young M.O.D.O.K. The family leaves feeling united for the first time in a while.

Super villain M.O.D.O.K. runs his evil organization AIM into the ground and is forced to sell it to the tech company GRUMBL. As the megalomaniacal M.O.D.O.K. struggles to regain control of AIM, he risks losing something even more important…his family!

In a bid to save his marriage, M.O.D.O.K. takes Jodie back in time to a concert they missed when they were in college. During a detour to kill the child-version of his GRUMBL boss, M.O.D.O.K. and Jodie are attacked by college-aged M.O.D.O.K., who accidentally absorbs their time crystals, stranding them in 2002. The couple reconciles but is stuck in the past until they catch up to the present. Once in the present, they prevent themselves from ever going to the past in the first place, erasing their entire adventure from the timeline.

Cracks start to show as the survivors find different ways to cope. Jonathan’s increasingly perturbed by Sacha’s strange behaviour. Emily proves to be an exciting conundrum for Bill. And Mokrani is horrified as his men delight in the opportunity to exact revenge.

The alien’s connection to certain survivors raises difficult questions. Bill makes a startling discovery. Sacha’s behaviour is increasingly erratic. And Tom’s birthday proves cause for celebration. But at what cost?

After a victim of the apartment fire that changed Bobby's life resurfaces, he searches to make amends; driven by his need to right past wrongs, Bobby delves deep into memories of his childhood, unearthing moments from his fractured past.

The 118 and Tommy are presented with the Medal of Valor for their work on the cruise ship rescue; Hen and Karen encounter an unforeseen hurdle in their foster care journey; Eddie's emotional affair develops further.

Following the devastating fire at the Nash home, Bobby's fate remains uncertain; Athena embarks on a mission to uncover the truth; Hen and Karin engage in a heated custody battle; Christopher grapples with forgiving Eddie.

While Reid copes with a loss in his personal life, the rest of the BAU travels to San Francisco to investigate victims discovered in the Mission District.

When the daughters of Bruce Morrison, a writer whose wife mysteriously vanished a year ago, go missing on the anniversary of their mother’s disappearance, the BAU is brought in to study Morrison as a possible suspect.

Detective Ryan ends up in the middle of an assassination plot when he is on the security detail of a charismatic congressman; Castle and Beckett help Ryan investigate.

When Richie “The Pitbull” Falco, a larger-than-life personal-injury attorney is found dead, Beckett and Castle investigate the many clients and competitors who had motive to kill him. But the mystery deepens when they discover a shocking secret.

A recurring dream causes Castle and Beckett to try and find some answers about Castle's disappearance.

The BAU heads to Austin to investigate victims found there with their watches set inaccurately, a clue which may connect the crimes. Meanwhile, the UnSub stalking the BAU inches closer in his pursuit of the team.

When victims are found in Philadelphia in a similar style to victims of The Replicator, the stalker who has been tracking the BAU’s every move, the team thinks this could be the break they need to try and apprehend him.

The case of a maid's death turns out to be a bigger case than originally thought. Tensions are rising between Cam and Brennan.

The team investigate a billion dollar hedge fund company when severely damaged remains from human's are found under a merry go round.

After an air marshal is murdered on Alexis and Castle's flight, they attempt to work out the identity of the killer.

Castle and Beckett investigate the murder of Sid Ross, the creator of "Saturday Night Tonight".

A car bomb ignites an investigation for Will and bomb expert Cricket, revealing more than meets the eye; Angie battles to return to work; Ormewood's home life gets complicated; Faith develops her relationship with Luke.

Will confronts James at the prison, unraveling inmate secrets, while Faith makes her own discoveries; Ormewood works on his familial relationships; Angie faces a moment that brings back memories from her past.

Detective Ryan ends up in the middle of an assassination plot when he is on the security detail of a charismatic congressman; Castle and Beckett help Ryan investigate.

When Richie “The Pitbull” Falco, a larger-than-life personal-injury attorney is found dead, Beckett and Castle investigate the many clients and competitors who had motive to kill him. But the mystery deepens when they discover a shocking secret.

The team are called in after a crossword puzzle master is discovered in an urban fracking site.

In the aftermath of Faith's deepening entanglement with Malcolm, her undercover work and emotions collide; Amanda faces an unexpected challenge as Seth and Angie's next chapter begins to take shape.

While Reid copes with a loss in his personal life, the rest of the BAU travels to San Francisco to investigate victims discovered in the Mission District.

When the daughters of Bruce Morrison, a writer whose wife mysteriously vanished a year ago, go missing on the anniversary of their mother’s disappearance, the BAU is brought in to study Morrison as a possible suspect.

The case of a maid's death turns out to be a bigger case than originally thought. Tensions are rising between Cam and Brennan.

The team investigate a billion dollar hedge fund company when severely damaged remains from human's are found under a merry go round.

As threats against Amanda escalate, Will investigates, narrowing down a list of potential suspects; Amanda is forced to confront moments from her past; Ormewood struggles in Gina's absence.

The BAU travel to Rapid City after two male victims are discovered murdered in a ritualistic manner. Also, Reid continues to grieve over Maeve’s death.

The BAU travels to Los Angeles looking for an UnSub who is kidnapping nannies and the children they care for on the same day each year.