Convinced that the study group was destined to meet, Abed pieces together everyone's past revealing that their lives have always been intertwined. Chang tries to destroy Greendale once and for all.

Sherlock resumes his hunt for Moriarty when Sebastian Moran reveals that a man who was thought to be dead from a heart attack was actually on the list of intended victims from Moriarty.

The members of New Directions take on the greatest hits of music icon Stevie Wonder. Meanwhile, Artie receives news that could affect his future and his mom. In New York, Rachel prepares for her "Funny Girl" callback.

The doctors reach out to Bailey but she continues to shut everyone out; after an incident with Ethan's grandmother, Owen fears the child could end up in foster care. A new craniofacial specialist arrives at Grey Sloan Memorial Hospital to work on a young patient. Meanwhile, a magician's assistant is rushed into the ER after a magic trick goes terribly wrong.

Jack and Alana are contacted by a former colleague, Dr. Chilton, who believes he has The Chesapeake Ripper in custody, but then one of his patients commits a murder that matches The Ripper's profile. The team determines the Ripper was a surgeon and is still at large when Jack's former protege Miriam becomes the next victim. Jack copes with her loss and the prospect of losing his wife by opening-up to Hannibal.

From "Bling Ring", Paris Hilton; Miriam Tucker (swallowed and recovered a $5,000 diamond); musical guests Atlas Genius.

Leslie celebrates her first year as a city councilwoman. Retired Special Agent Burt Macklin is recalled to action. April gets some life-changing news. Tom debates a big business opportunity.

When a virus causes the machine to malfunction, numbers are issued irregularly; the team searches for an extremely elusive tech millionaire.

The team continue their investigation into the mole and make a shocking discovery in the process. Meanwhile Fitz orders Jake to continue to protect Olivia, who is still very much in danger, and back at the White House Mellie's ultimatum forces Cyrus into the role of "fixer."

Leonard and Sheldon hire the host (Bob Newhart) of their favorite childhood TV show to perform; Bernadette and Howard run into trouble while dog-sitting for Raj's pet.

The Feds identify three accomplices in the Boston bombings, President Obama addresses the Gitmo hunger strike, and Sir Ben Kingsley chats about "Iron Man 3".

From "Love Is All You Need", actor Pierce Brosnan; comic Tone Bell.

Andy attempts to get enough strength to quit his job and pursue his dream as an actor. Dwight finally receives his black belt in karate from his new sensei. Jim returns to Scranton and spends time with Pam.

Damon and Stefan try a brutal new approach to provoke Elena into turning her humanity back on, and Caroline is frustrated when her attempt to intervene backfires. When Elena figures out a way to call the Salvatore brothers' bluff, they call for backup from a surprising source. Matt gives Rebekah some unsolicited advice on her life choices, and she tries to help him in return. Caroline has a confusing and dangerous encounter with Klaus, and Katherine is suspicious when Bonnie makes her an offer that she promises will benefit them both.