Leonard's book raises questions, and Amy guest stars on the new Professor Proton show.
The queens go full diva in a lip-syncing dance number inspired by the classic TV specials "VH1 Divas Live". With guest judge Vanessa Williams and choreographer Todrick Hall.
When flu season hits Medford, Sheldon takes extreme measures to remain healthy.
When Christy's car dies, Bonnie refuses to let Adam loan her money for a new one.
After responding to a time-sensitive rescue, Casey and Severide don't see eye to eye on the best course of action. Herrmann struggles to entertain his daughter on "bring your child to work day." Brett is joined by a surprise guest during a spa getaway, courtesy of Dawson, while Kidd's social life gets a boost.
Dean falls victim to a couple of witches, sisters Jamie and Jennie Plum, who manage to steal a powerful book of spells from the Winchester brothers. When Sam and Dean go after the book, they get help from a powerful and surprising ally when Rowena, back from the dead, intervenes to assist them.
Oliver continues his battle with Cayden James. Dinah and Oliver have a major disagreement that endangers the life of one of their own.
Jack Griffin is a Harvard philosophy scholar who loses out on his dream job and goes to work as a high school Advanced Placement biology teacher in his hometown of Toledo, Ohio. He quickly makes it clear he will not be teaching any biology, however, and, realizing he has a room full of overachieving honor roll students at his disposal, decides instead to use the kids to enact revenge on his rival and take the job that is rightfully his.
Using his 1899 Appleton's guide, Michael Portillo's rail odyssey through eastern Canada continues along the Grand Trunk railway, following the route of the St Lawrence River. At Brockville, he leaves the tracks for a nautical pilgrimage through the beautiful Thousand Islands. In the port city of Kingston, Ontario, Michael visits Fort Henry and, dressed for the occasion, is entrusted to fire the naval guns that protected the nation's southern border during the 19th century. Travelling west to Port Hope, he learns of the antics of a celebrated 19th-century high-wire walker known as The Great Farini. And, in the spirit of showmanship, Michael tests his balance with the modern sport of slack lining. This leg of the journey ends in Oshawa at the opulent home of the McLaughlin family, who helped build a new economy for Canada when they switched from manufacturing carriages to motor cars.
The remaining 10 bakers attempt to put their own twist on biscotti for their signature bakes. They also make jam drops and a biscuit jigsaw puzzle to impress the judges.
K.C. and Marisa take Amy on a trip to New York so she won't be at home to witness her "parents" being arrested by the Organization.
K.C. decides to save Ernie since it was her fault the barbecue failed. They learn the Bishops have planted listening devices and someone called the "The Mask" wants the weapons sold.
A con artist Nev and Max know well is now asking for their help after finding love on the internet.
All seems well for Mary, Ben has forgiven her, and she and Des have decided to move forward with the death retreat. The only nagging concern for Mary: her daughter Jess hates her and doesn't believe a word out of her mouth.
The crew races to an emergency when disaster strikes at an Indian wedding. Abby enlists the help of Buck to try and find her mother and, for the first time, meets Athena face-to-face. Meanwhile, Bobby has a difficult time confronting his past and Hen struggles to make the right decision.
As Liz works with Red to hunt for Tom's killers, she begins to question his motives. The Task Force enlists the help of one arsonist to catch another.
When a gang from El Salvador infiltrates Chicago, Intelligence works with a visiting detective to put an end to the crew's brutal tactics. Meanwhile, Antonio finds himself getting close to Salvadoran Detective Marcella Gomez and Voight learns that the body of his son's killer has been found.
As Eliot is hunted, Quentin and Julia discover a powerful secret tied to the history of Brakebills.