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.
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.
When a virus causes the machine to malfunction, numbers are issued irregularly; the team searches for an extremely elusive tech millionaire.
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.
Abed's research into the study group's history uncovers an overlooked series of chance encounters that led each of them to Greendale.
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.
There is no lack of suspects when a famous boxer is discovered stabbed to death in his own gym.
Dwight becomes regional manager after Andy quits his job, Jim dedicates more time to his Dunder Mifflin job to save his marriage, and Angela has problems with her new living arrangements after her breakup with The Senator.
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.
Antony Cotton, Jack P. Shepherd, Brooke Vincent, Catherine Tyldesley, Nitin Ganatra, Charlie Brooks, Tameka Empson and Tony Discipline
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."
Driven by a desire to avenge his own downfall, Aiden plots against his old friend Bruce. He is also spending more time at home looking after the children and particularly their Asperger's son, Noah. As he sitson the side-lines watching his wife's meteoric rise, Aiden is increasingly consumed with jealousy and paranoia. Unable to accept his wife's new-found success or forgive her betrayal, Aiden begins to plot Freya's downfall as well as Bruce's.
Vinnie's plan to teach Wendell to love baseball backfires when Wendell chooses to root for Vinnie's arch rivals.
A massive sinkhole consumes part of Troy Landry's hunting grounds and he and his sons must race to his remaining lines in the same area before they are swallowed up. "The Beast of the East" is chased by swampers using gator calls and while one team comes up with a clever way to extract gators from a huge snarled lily field, another bravely hunts for "The Monster of Monster Marsh" while trying to outrun a deadly lightning storm. The biggest gator of the season so far is caught and wrestled onboard.
The contestants face elimination. David Cook performs; will.i.am peforms; Harry Connick Jr. performs.