Reagan wants to secure a spot at a prestigious preschool for Amy and tries to win favor by organizing a charity auction with Ava's help. Elsewhere, Chris and his brother find that they haven't outgrown their competitive ways from childhood.
The Machine gives Reese and Finch the number of a down-and-out man who has been pushed too far, and they're forced to turn to former Person of Interest Zoe Morgan for help.
As Meredith puts Zola to bed and falls asleep, she begins to wonder -- what if her mother had never had Alzheimer's and she'd had loving, supportive parents? The reverberations of a happy Meredith Grey change the world of Seattle Grace as we know it. What if she had never met Derek in that bar and he had never separated from Addison? What if Callie and Owen had become a couple long before she met Arizona? And what if Bailey never evolved from the meek intern she once was?
Cassie enlists the Circle's help when she receives a frightening warning about the witch hunters' return. At the same time, her true feelings for Adam and Jake surface during a birthday party that Ethan decides to throw with the help of Diana. Meanwhile, Faye and Melissa take their inner power to a chilling new level when they try a little of Lee's Devil's Spirit.
ISIS transports a Canadian terrorist by train to Mounties in Canada. Will Nova Scotian terrorists free him? Will the drunk Sterling fulfill his dream of fighting on the roof of a moving train?
Sheriff Forbes delivers some disturbing news to Alaric and Elena about the weapon used in a recent murder. In the Salvatore brothers escalating quest to kill Klaus, Stefan turns to Bonnie and Abby, while Damon reaches out to an old acquaintance for help in setting up an elaborate plan. Intent on a plan of his own, Klaus hosts a strange dinner party, where he reveals another story from his familys violent past until an unexpected guest brings the party to an end. Meanwhile, Caroline is heartbroken when she is unable to stop a tragedy from unfolding.
Jane and the CBI narrow down the list of suspects after a disgraced clothing designer on the verge of a comeback becomes a fashion victim. Meanwhile, FBI Agent Darcy continues her investigation into finding Red John.
Liz finds a secret weapon to help in her contract negotiations with Jack, Kenneth leaves his job because he feels under-appreciated, and Tracy and Jenna perform at their accountant's ungrateful son's Bar Mitzvah.
Joy tries to apologize to Nina, who is upset over Gran being cursed, but the gang isn't having it and they freeze Joy out. Sibuna realizes that in order to complete the task, they will have to borrow a "Sibuna temp" to hold the sixth reflector, so Patricia hatches a plan to bring a blindfolded Eddie into the tunnels under the pretense of a "date." Sibuna and the oblivious Eddie manage to complete the task and enter the final chamber.
Sheldon's selfish demands force Leonard to reconsider their friendship. Meanwhile, Wolowitz tries to pick his astronaut nickname.
When a poisonous article about Nina appears on the school website, speculation is rife about the identity of the school's phantom blogger. In order to save Vera, Victor hatches a plan and leaves his reflectors in his office, knowing that Sibuna will snoop around and find them when he goes out. The gang succeeds in finding the objects, and Fabian also finds Victor's completed zodiac, along with a list of where he believes the remaining reflectors are. Alfie and Amber go into the attic to retrieve the reflector from the stained glass window but, unaware that Vera is still catatonic nearby (concealed beneath a blanket by Victor), they accidentally reveal the existence of the passage between the tunnels and the library.
Jim returns from jury duty, only to have to deal with Dwight's pesky questions about the details of the case. Elsewhere, Angela and her senator beau welcome their baby.
Leslie works to find Ann a Valentine's date. Ron helps Ben with a scavenger hunt, and Chris becomes depressed over his love life.
Vinny returns and everyone celebrates. Mike tries hard to be nice but winds up annoying the boys. Snooki struggles with an uncomfortable condition.
Short videos showing typical funny moments in French life, depicting way of life, being, laughing, habits, and using slang vocabulary. Specially recommended for Parisians and / or people who lived there.
Sheldon counsels Sam's friend, Rick, an Army veteran suffering from PTSD who harbors a secret sexual trauma; Erica and Mason are involved in a car accident that forces Cooper and Charlotte to further come to grips with their future; Violet and Pete struggle to navigate life after marriage when he finds her kissing Scott; and Addison and Jake attend a medical conference they won't soon forget.
The All Stars take to the streets of New York to convince total strangers to part with their clothes in the name of fashion. Their muse's outfits are ripped apart and reborn in the hands of an All Star.
Isabel's new boyfriend Frank, an all-star baseball athlete, gets robbed, and Walter steps in to help find his stolen collectibles. But in the process, Walter learns Frank has lost something more meaningful than memorabilia. Then, to earn Willa's trust, Leo and Walter bring her in on the case.
Jason, egged on by his friends and several beers, posts an ad looking for Jane on missed connections. Tina loses her license to mock him, when, while anxiously awaiting a text from Brett, she de-virginizes an intern. Stacey and Eric have new mattress sex on a mattress that turns out to be anything but new.