Morgan puts on a feast for King Arthur and his Knights at Castle Pendragon which turns to panic as the castle comes under attack. As Arthur and Morgan's men join forces to fight, Merlin believes a plan is afoot.
The ladies bask at a mask bash when Sonja hosts a masquerade ball. In addition, Cindy goes to the dentist with Jill in tow, but Jill adds some bite by offering way too much input. And Ramona throws a wine party, but gossip spills over.
After years of pursuit and a countless number of murders, Langston comes face-to-face with serial killer Nate Haskell inside the house where his killing spree began.
When Betsey returns to the ER for a second visit, the concerned Oceanside doctors start investigating the foster family. Amelia struggles to stay sober while Naomi announces a life changing decision affecting her family.
In Birmingham, Detectives Eric Torrence and Henry Lucas investigate the murder of a 31-year-old male found dead in a field. But with a tight-lipped community where street law is paramount, finding someone to talk is the team's biggest challenge. As the clock winds down, will the community pull through and bring the killer to justice? Then, in Charlotte a man is chased down and killed in front of his nine-year-old son. Detective Blair Fitch is shocked to discover the killer was getting even with someone else. The case takes a surprising turn and leads detectives to New York where the suspect turns up in relation to another murder.
Percy makes a move to take over the CIA, Alex goes rogue, and Michael gets trapped inside Division making him unable to help Nikita, who may have to pay with her life for helping Alex.
The search for the missing locket continues with the investigation turning to Christopher Biggins for answers. Meanwhile, we find out what happened to Robert and Kerry as we return to the mysterious cottage in the woods.
The driver of Wratten's car is identified, and Gabriel and Joseph Bede are desperate to get to him first, but they find themselves in a three-horse race with a shadowy figure that always seems to be one step ahead of them.
As a severe storm nears Southern Louisiana, the hunters are preparing for the worst. With his sharpshooter Liz still recovering from an injury, Troy and Jacob pit themselves against the gnarly weather. Troy uses an old Cajun strategy, employing a special bait to lure the gators despite the storm. Joe and Tommy are not on the same page.
A finalist is sent home; premiere of the video for Steven Tyler's ``(It) Feels so Good''; Jordin Sparks performs.
Faulty Bridge, Twister Mill, Wipeout Laundromat, Scareousel and Super Tramp Challenge are among the obstacles faced.
Personal and work pressures are adding up and have Meredith visibly on edge, Owen conducts formal interviews for the Chief Resident position, Cristina grows increasingly defiant, Alex and Lucy's undefined relationship gets tested, and Jackson suddenly backs out of the Webber's diabetes trial.
When Leslie tries to get Ann a job at city hall, her lukewarm reaction causes their first-ever fight. Tom invites the entire department to the Snakehole Lounge to help him promote his new alcohol, "Snake Juice."
When Chris sends Leslie and Ben on a trip to Indianapolis, Leslie is afraid she won't be able to deny her feelings for him. Ron teaches a young student about his views on government. Meanwhile, Andy gets his feelings hurt by April after playing Tom's new game.
Mystic Falls screens "Gone with The Wind" in the town square, and Damon's memories of Katherine in 1864 mix with the reality of present-day Elena. Stefan pays a steep price after trying to prevent a tragedy, and Sheriff Forbes makes a dangerous mistake while trying to keep everyone safe. Multiple lives hang in the balance as the consequences of the sacrifice ritual play out to a horrifying conclusion.
After a young violinist is shot to death, Patrick Jane questions the members of the Northern California Symphony Orchestra about the murder. Meanwhile, Cho crosses paths with a precocious young pickpocket.