Barry and Chester may have found a way to stop the Black Flame from hurting anyone else; Caitlin decides to handle a situation on her own, possibly putting more innocent lives in danger.
At the V&A, John Constable's landscape prints are revealed, Minnie the Minx takes charge and the memento of a royal love affair goes on show.
The gang gathers for a fun and festive game night as a means to distract Gary from dwelling on a heavy situation.
After welcoming a new family member, Jackie jets across the country to take care of some special touches for the home, including a signature beer to serve in Versailles' Pub. Then, cheers turn to tears when she gets an update on her husband's health.
Evan proposes an idea to save Bulk Beauty; Alice is back but still at odds with Sumi; Isabella's surprise '90s-themed 40th birthday party for Dennis makes Davia fear she's losing him; Angelica and Dyonte meet
Castaways drop their buffs and rearrange tribes before an intense immunity challenge; one castaway is taken to another island and has the power to change the game.
Robert is back to see if Dr. Lee and Dr. Umar can remove his recurring head keloid for good. Justice has small lesions all over her body that get inflamed. Mike has hundreds of lipomas that bring him great discomfort.
As Tom struggles to finish his book, his dad, Marshall, hijacks his writing seminar; Denise convinces Marina that she needs to do something special for Tom's 40th; Sarah and Denise go try to impress a potential sperm donor.
Halstead takes a new recruit under his wing during an investigation. The dynamics are challenging, however, and questions arise over the recruit's complicated past.
Firehouse 51 must band together when one of their own is taken hostage.
A tip from Evan leads Nicky and Mia to a secret meeting. Nicky begins to question her relationship with Mia. Henry's findings lead him to an expert that may help him decipher his research.
Dan enlists the help of a few friends for the funeral home remodel; Louise points out that Dan's generosity with his time seems to benefit everyone but her; Robin and Darlene take a career risk that may not pay off the way they expect it.
Ancher and Asher come into conflict over a patient with close ties to Goodwin. After a patient is shot during a burglary, Scott and Marcel help with the investigation.
When Beverly steps in as PE coach at William Penn Academy, Adam reluctantly takes her Jazzercise class; Brea tries to show Adam his mother's good intentions; Barry and Geoff find themselves both up for the same medical internship.
Bruce returns home from Vietnam, and the family is shocked to find out he is dating an older woman with a son with whom he is eager to start his life; when they learn more about Bruce's last deployment, they come together to support him.
Kim Sae Ha, a Bureau employee, encounters a murderer. Jung Sae Byeok, a detective, is dispatched to arrest the murderer. While in pursuit of the fugitive, she witnesses an unbelievable phenomenon.
Nagomu Irino returns to his Kyoto home for the first time in ten years when his father is hospitalized. Nagomu is eager to take over Ryokushou, the family's Japanese sweet shop, but he's instead asked to be a father figure to Itsuka Yukihira, the girl everyone calls the successor.