The Machine gives Finch and Reese the number of a brilliant surgeon, but they soon discover that a resourceful third party has raised the stakes for this POI, forcing them to turn to an unlikely source for help.
Terrifying hallucinations leave Elena shaken and confused, causing her to make a dangerous mistake. After giving Stefan some very disturbing news about Elena, Klaus takes matters into his own hands. Professor Shane reveals a story of ancient witchcraft to Damon and Bonnie. With help from Klaus and Stefan, Jeremy begins a new chapter in his life. Finally, Elena makes a painful personal confession to Stefan, and Matt gives Damon startling new information about Professor Shane.
Sam and Marcus look for the traitor who stole the nuclear launch key when Prosser disobeys orders, he starts a conflict he can't control Grace and James try to defuse a dangerous situation.
Sherlock assists with a double homicide that has the same M.O. as a series of murders that took place years ago. Meanwhile, after being frozen out by Sherlock, Watson visits his old rehab center in order to learn more about the mysterious man in her care.
Michael is accused of a crime at a local hotel. Elsewhere, Olivia questions Sam in an attempt to get to Michael.
The women of the office try to teach Dwight how to interact with female clients Angela suspects the senator of cheating Toby convinces some of the guys to grow mustaches.
Leslie gets upset when April tries to get Lot made into a dog park. Meanwhile, Tom enlists Bens help as he tries to launch his new business venture, and Andy hones his crime scene investigation skills.
Mac, Charlie and Dee struggle with their faith as Charlie's mom fights cancer. Meanwhile, Frank loses his memory amidst a search for buried treasure.
In the computer world of the Grid, a young program joins Tron's fight against their world's tyranny.
Justin, Olive, and Squidgy make an important delivery across the Northwest Passage thanks to a helpful narwhal.
Rachel and Kurt pay a visit to Lima as the glee club launches its production of "Grease". Meanwhile, Cassandra July returns to shake things up in Rachel's life, and Santana comes back to lend a helping hand.
A mason repoints the foundation. Norm and Tom repair the front porch. Kevin visits Community Rowing. Spray foam insulation begins in our balloon frame house.
Jenni plans a "Shore Shower" for Nicole and invites all the roommates. The guys support Mike's decision to dump Paula and tag along for a front row seat to all the action.
Traveling to Vertress City and the Unova League, our heroes are introduced to a brave family on a mission of service!
The five remaining beauties put their number skills to the test in a car wash mathematics challenge. The geeks enter the world of feminine beauty by receiving 45 minutes to dye, cut and style their way to a transformation that their client loves, under the watchful eye of an expert beautician judge, before the geeks with the two best makeovers have to wax the legs of six clients each, including one male pair of legs. They are all then invited back to the Elimination Room for a grand banquet where they are served up a surprise in the form of the five eliminated teams. ...
The six beauties face their fears while having to solve picture puzzles of their geek's idols. The returning geek is given his makeover, before all six geeks have to bulk up in preparation for a bodybuilding competition where they have to pull some classic poses and perform their own freestyle routines, with the audience casting their votes to decide the winner. The winners of the two challenges each nominate a team to send to the Elimination Room, where they participate in a quiz in which the team with fewer correct answers is eliminated.
After she's seemingly stood up by Vincent, Cat wonders if it's because he saw her kissing Evan at her birthday. Actually, Vincent mysteriously blacked out on his way to meet Cat, and is now searching for answers. Cat's case pulls her into the sophisticated world of the SoHo art scene. When Vincent finds Cat all dressed up to go to a gallery opening -- with Evan -- he has to admit that his feelings for her are growing deeper. All the while Evan makes his affections for Cat known, leaving Cat torn between the two very different suitors.
Alan feels reluctant to make a commitment to Lyndsey, but an unexpected source inspires him Walden enjoys being the boy-toy of a wealthy older woman.
Swaggering Silvio Pirelli, the leading swordsman in Italy, comes to Florence and annoys Lisa with his bragging. As Tom she challenges him to a dual, despite being totally inexperienced, and starts to have second thoughts. However she goes through with it, though things are looking bad for her until Leonardo takes time off from designing the super-weapon to provide an explosive diversion which helps her to give Pirelli his come-uppance. Angelica tells Macchiavelli that, due to the arranged marriage, they can no longer meet but she does agree to keep Lisa's secret.