The BAU is called to New York when several casualties of abrutal nature are reported in Central Park.
In 43AD the Roman Imperial Army - determined and terrified inequal measure - returns to crush the Celtic heart of Britannia- a mysterious land ruled by warrior women and powerful druidswho can channel the powerful forces of the underworld.
DI Jack Mooney and the team find themselves in the middle of amurder mystery when famous thriller author Frank O'Toole isfound stabbed through the heart after taking an early morningswim in the ocean.
Karl and Elise face a tense and gripping showdown with the PiedPiper, while the truth about the Moreau abduction is revealedat last.
The girls have been up all night cramming for a big exam. Some(Michelle and Erin) haven't studied for it enough whilstClare's over-studied, leaving herself completely sleepdeprived and slightly manic. Everyone is convinced they'regoing to fail. So when a distinctly dubious opportunitypresents itself to get out of the exam they jump at the chance.Especially as it involves them spending time with the verybeautiful Father Peter.
With his mission in the Realm seemingly behind him, Holdenthrows himself into his new "normal" life, workinga regular job and furthering his relationship with Willa, buthe can't shake the feeling that something is coming.Meanwhile, Diane is asked to make a huge sacrifice to furtherthe investigation into Hollow Sky, one that doesn't sit wellwith Tom, and Charlie reappears hiding a secret, and actingon orders from Yellow Jacket.
Koothrappali finds himself in the middle of domestic drama whenhe learns the woman he's dating, has a very upset husband.Also, when Sheldon rents his old room back for a quiet placeto work, he drives Leonard crazy by being a model tenant.
Jo finally faces her estranged, abusive husband Paul Stadler,while Grey Sloan continues to work with the FBI after a hackerhas compromised the hospital's computer system.
When Sam and Dean go missing, Jody Mills calls Claire Novak,the rebellious rogue hunter, and tells her it is time to comehome - they need to find the Winchesters. Claire returns andreunites with Alex Jones, who has stayed behind with Jody andtries to balance a "normal" life with being a parttime hunter. While Jody is happy to have Claire home again,she's plagued by Patience's disturbing vision involving heradopted daughter. Claire and Alex search for Kaia Nieves, thedreamcatcher responsible for opening the rift that Sam and Deanwent through, as she holds the key to their whereabouts. Jodycalls her friend, Donna Hanscum, to round out the team andthe women head off on the most important hunt of their lives.
Corporate announces that the store is getting an upgrade:Amy, Jonah, and Dina set out to discover the pros and cons;Cheyenne accidentally volunteers to be Glenn's surrogate.
Melissa says her husband refuses to get a job, dresses like a"demonic clown" and spends all day composing and posting "vile"music about killing people; members of Insane Clown Posse saywhat they think of his music.
Eleanor, Chidi, Tahani, Janet, and Jason head to adestination that may have lasting implications.
Sheldon asks for a computer and unknowingly sparks a heatedargument between Mary and George Sr. over the family'sfinances.
After Bonnie and Adam attend a traditional wedding, theydiscover they're not on the same page about their own wedding.Also, Christy and Patrick have trouble setting the mood fortheir "first time".
DI Jack Mooney and the team find themselves in the middle of amurder mystery when famous thriller author Frank O'Toole isfound stabbed through the heart after taking an early morningswim in the ocean.Having stayed at Frank's house the night ofthe murder, and Frank being discovered on the beach the nextmorning, suspicion soon falls upon Frank's wife, agent andresearch assistant Valerie. However, with eye witnessesconfirming that Frank was swimming alone and all suspectsclaiming to be in bed, how could anyone have known where Frankwas - and how did they get from the house to the sea withoutbeing detected?Meanwhile, as the island prepares for Erzulie,the festival celebrating the Voodoo Goddess of love, Dwayneconcentrates on finding a date. Will Dwayne finally meet hismatch when he sets his sights on Darlene? Elsewhere, Jack andFlorence track down a lead on the murder case from oversees.
Despite losing half his team, Oliver remains confident thathe, Felicity and Diggle can stop Cayden James and Black Siren.However, when he discovers one of Cayden's secrets, hedecides to team up with an unlikely ally. Meanwhile, Dinahspends time with Vince.
Willa shows up unexpectedly at the Matthews house for anuncomfortable "meet the family" dinner. Willastruggles with trying to convince Arthur to let go of theRealm, while she and Holden try to navigate theirrelationship. Meanwhile, Charlie learns some surprisingsecrets during an unauthorized house call -at Yellow Jacket'srequest.
The fallout from Rowan's desperate action affects Quinn's lovedones, including a guilt-ridden Olivia.
Will, Grace, Jack and Karen attend the wedding of Will'sex-boyfriend, Vince. While Grace tries to keep Will frommaking a scene, Jack learns that his wedding hookup has manystrings attached.
After an explosive fight with her daughter, Caro is excitedabout her new position at "Morning Wined Up", butis disappointed to realize that the job offers lessresponsibility than she had hoped. Katie is determined to bringdown Fenton Pelt, the billionaire suing "TheBreakdown", despite specific orders from Greg and thenetwork's attorney to leave him alone. When Katie's rousingspeech about journalistic integrity fails to inspire anyone butChuck, who has been suspended from the show, she reluctantlyjoins forces, only to find that his investigative skillsaren't what they used to be.
When Jen sings in Tyler's band, she gets caught up in theexcitement and creates an awkward situation for him. Also,John and Greg decide to brew beer together, Matt donates oneof his paintings to a silent auction for Tim's medicalcharity, and Heather becomes jealous of Joan's friendship witha classmate.
The group deals with more obstacles as police investigate theaccidental shooting of Simon; Laurel and her baby cling tolife.
After learning unsettling news, Dawson enlists Severide tohelp her out. Elsewhere, Casey and Dawson struggle withcommunication issues while Brett and Kidd compete to win theheart of Zach, a Hazmat officer. Meanwhile, Otis, Herrmannand Mouch are on a mission to locate the source of a horriblestench that is making life unpleasant at Firehouse 51.
Seth and Creeley must confront the truth about their past andfigure out a way to survive the rapidly arriving future.
Spyke gets his old band back together: podcasters investigatea police station; Candace brings Toni to her childhood summerhome; Brendan and Michelle consider buying a van.
Hondo teams up with an old DEA friend, Special Agent Katrina"K.C". Walsh, on a task force aimed at unmaskingthe secret leader of a fentanyl drug smuggling ring. Also,Jessica and Michael Plank, president of the PoliceCommission, begin implementing her new law enforcementcommunity initiatives.
The Dredge possesses Calvin to break free of the Ring ofSolomon and re-inhabit his original body.
With his mission in the Realm seemingly behind him, Holdenthrows himself into his new "normal" life, working a regularjob and furthering his relationship with Willa, but he can'tshake the feeling that something is coming. Meanwhile, Dianeis asked to make a huge sacrifice to further the investigationinto Hollow Sky, one that doesn't sit well with Tom, andCharlie reappears hiding a secret, and acting on orders fromYellow Jacket.
Jo finally faces her estranged, abusive husband Paul Stadler,while Grey Sloan continues to work with the FBI after a hackerhas compromised the hospital's computer system.
When Sam and Dean go missing, Jody Mills calls Claire Novak,the rebellious rogue hunter, and tells her it is time to comehome - they need to find the Winchesters. Claire returns andreunites with Alex Jones, who has stayed behind with Jody andtries to balance a "normal" life with being a part time hunter.While Jody is happy to have Claire home again, she's plaguedby Patience's disturbing vision involving her adopted daughter.Claire and Alex search for Kaia Nieves, the dreamcatcherresponsible for opening the rift that Sam and Dean wentthrough, as she holds the key to their whereabouts. Jody callsher friend, Donna Hanscum, to round out the team and thewomen head off on the most important hunt of their lives.
Koothrappali finds himself in the middle of domestic drama whenhe learns the woman he's dating, Nell, has a very upsethusband, Oliver. Also, when Sheldon rents his old room backfor a quiet place to work, he drives Leonard crazy by being amodel tenant.
Eleanor, Chidi, Tahani, Janet and Jason head to adestination that may have lasting implications.
Sheldon asks for a computer and unknowingly sparks a heatedargument between Mary and George Sr. over the family'sfinances.
Despite losing half his team, Oliver remains confident thathe, Felicity and Diggle can stop Cayden James and Black Siren.However, when he discovers one of Cayden's secrets, hedecides to team up with an unlikely ally. Meanwhile, Dinahspends time with Vince.
Willa shows up unexpectedly at the Matthews house for anuncomfortable "meet the family" dinner. Willa struggles withtrying to convince Arthur to let go of the Realm, while sheand Holden try to navigate their relationship. Meanwhile,Charlie learns some surprising secrets during an unauthorizedhouse call –at Yellow Jacket's request.