Dean Pelton lets two designers test their new social networking application at Greendale, leading to a war among the students; Professor Hickey decides to go underground until the battle ends.

Holmes and Watson consult on a case in which a man suspected of murdering his wife years ago receives a ransom demand for her safe return. Meanwhile, Lestrade overstays his welcome at the brownstone and seems unwilling to leave.

After an anonymous complaint is issued by one of their own, the hospital implements a non-fraternizing policy causing the couples to panic. Meanwhile, Emma and Owen talk about the future, Cristina and Meredith enjoy a little girl time, and Richard enlists the residents to help research a rare cancer case.

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Kristina starts a new adventure; while Amber encourages Drew to move on, Julia has a difficult time letting go of her past; Sarah considers an offer from Carl; Hank makes a confession.

After Leslie tries to take down the wall separating Pawnee and Eagleton, her life takes several unexpected turns. Tom and Ben meet with potential corporate sponsors for the concert, while Ron brings a surprise to the office and finds a new office hobby.

Ecoterrorists protest animal testing at a makeup company; Bryce and Lisa Rent it Out!; Toni and Candace have a car wash; Fred misses hip hop; Dave helps Kath get a good night's sleep.

With a forced marriage looming, Mary must consider both her heart and her nation when deciding whom she will wed – Francis or Bash – when Francis returns to court with Lola at his side. Further complicating matters is Mary’s mother, Marie de Guise, who visits the castle with her own agenda for Mary. Marie’s presence worries King Henry and Queen Catherine, who have their own plan for the future of France, regardless of who gets hurt in the process.

Forrest gets carried away while reviewing theft, finds that his threshold for addiction is high except when it comes to cocaine and takes his son's babysitter to prom.

Old feelings and jealousies arise at a Presidential event causing Fitz to face a harsh reality. Meanwhile, Quinn tries to prove herself to B613 and Leo Bergen sets up a meeting between Sally and an old friend.

Things get complicated when Harvey mixes business with pleasure and gets caught between Jessica and Scottie. Painful memories plague Mike as he uses a case to exorcise demons against an old foe, while Louis’ suspicions threaten to expose Mike.

Bernadette tries to negotiate peace between Sheldon and Wolowitz; Penny receives an embarrassing offer; Raj wants Amy to write to a woman on his behalf.

Massachusetts allows upskirt photography, teens pursue the "thigh gap," Warner Music holds "Happy Birthday" hostage, and Theaster Gates uses art to revitalize urban spaces.

Episode info coming soon ..

Jimmy has Liam Neeson, Lindsay Lohan, and a musical performance by Bad Things

While Nadia remembers her centuries-long search for her mother, Stefan, Caroline and Matt come up with a desperate new plan to save Elena’s life. For the second time, Bonnie and Jeremy must turn to Liv for help. Damon baits Tyler into a nasty confrontation, then takes off to seek revenge on Dr. Wes. Caroline and Tyler come to a new understanding. Finally, Bonnie learns of a terrifying secret that will threaten the lives of all her friends.

Four peaceful years have since passed with Ragnar as Earl. The time has come for an unlikely alliance to band together in pursuit of a common goal: a new raid on England. A storm pushes the Viking fleet to a new destination, and on the beaches of Wessex, Ragnar and his men may have met their match.