Emergencies include an accident at a grain silo and a steak eating contest, plus an unusual home intruder; Owen helps Michelle uncover new information about her sister's disappearance.

A deadly face-off leads to a life-threatening moment; Catherine and Sam seek help for his parents.

Bill's latest discovery is put in jeopardy, even as trouble brews with the human aliens; Catherine must decide where her loyalties lie.

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!

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!

A deadly face-off leads to a life-threatening moment; Catherine and Sam seek help for his parents.

Bill's latest discovery is put in jeopardy, even as trouble brews with the human aliens; Catherine must decide where her loyalties lie.

After two undercover DEA agents are murdered and a third goes missing, the BAU joins the NSA to investigate whether an underground Internet drug syndicate is involved. Also, Hotch hopes the team's work with the NSA brings them closer to finding the "Dirty Dozen" hitmen ring.

When a future Olympic swimmer is found dead in the pool, Castle and Beckett travel into the world of sports, drugs, and drug dealers.

"Future Perfect" -The BAU searches for an UnSub who may be fascinated with medical experimentation.

Against orders, Beckett travels to Los Angeles while investigating the murder of her training officer Michael Royce, last seen being arrested in the Under the Gun episode; Castle questions Beckett's motives.

R.J. finds himself at the center of a suburban housewife murder mystery; Catherine worries that R.J. is getting too close to Emi.

The crew races to a disaster at a wave pool, and an outbreak of mercury poisoning leaving its victims in a a zombie-like state; Owen must come to terms with his illness; Michelle follows a new lead on her missing sister.

Hodgins is eight weeks into his rehabilitation for his paralysis and forced to navigate life in a wheelchair. Meanwhile, Brennan and Booth investigate the death of a public defender who had multiple defendants from previous cases with motives to kill her.

After two undercover DEA agents are murdered and a third goes missing, the BAU joins the NSA to investigate whether an underground Internet drug syndicate is involved. Also, Hotch hopes the team's work with the NSA brings them closer to finding the "Dirty Dozen" hitmen ring.

"Future Perfect" -The BAU searches for an UnSub who may be fascinated with medical experimentation.

A dead man wakes up on Harrow's autopsy table and promptly takes him hostage. Meanwhile, Dass pieces together clues from Quinn's murder and uncovers evidence that Harrow destroyed evidence, proof he was covering his tracks. Season Finale.

R.J. finds himself at the center of a suburban housewife murder mystery; Catherine worries that R.J. is getting too close to Emi.

Castle and Beckett are called to investigate when a contestant in a beauty pageant is found strangled and every suspect has a motive to commit murder.

The team investigates a body found in a car crash, the remains of which belong to a founder of a men's rights organisation who may have been the victim of domestic abuse.

An assassin with knowledge of the details behind Beckett's mother's murder escapes from custody during his trial, leaving Castle and Beckett to track him down. A secret is revealed about Captain Montgomery's past and the identity of the third cop.

Emergencies include an accident at a grain silo and a steak eating contest, plus an unusual home intruder; Owen helps Michelle uncover new information about her sister's disappearance.

The BAU implements an elaborate strategy to try and take down the "Dirty Dozen" hitmen ring, with Reid playing a central role.

When bodies are discovered in public places throughout Boston, the BAU investigates whether a taxi or ride-share service the victims used before their deaths could lead the team to the UnSub.

Harrow recovers from a near-fatal shooting and returns immediately to work, investigating the tragic puzzle of a young mother's psychotic episode while trying to figure out who shot him.

An Ernest Hemingway lookalike is discovered adrift with a bullet hole in his head under a glass-bottom boat during a booze cruise.

R.J. finds himself at the center of a suburban housewife murder mystery; Catherine worries that R.J. is getting too close to Emi.

Castle and Beckett are called to investigate when a contestant in a beauty pageant is found strangled and every suspect has a motive to commit murder.

Harrow recovers from a near-fatal shooting and returns immediately to work, investigating the tragic puzzle of a young mother's psychotic episode while trying to figure out who shot him.

The BAU searches for a motive and an UnSub when victims are found in truck stop restrooms along highways throughout the South.

A massive tornado sweeps through Austin, as Owen, Michelle and their teams races to save those in its path.

On Beckett's first day back from her suspension, she and Castle are thrown into the salacious world of local TV news when WHNY's veteran weather girl is found dead.

When an 18-year-old girl escapes from a suburban home where she was held captive for years with two other women, the BAU searches for the Unsub who kidnapped them.