Graham kicks off this season with the Tenth Doctor David Tennant and his former companion (and ‘Much Ado About Nothing’ stage production co-star) Catherine Tate.
Magnus is revived to answer Ranna's questions and soon figures out that despite Ranna's efforts the city is in great deal of trouble and the fall of Praxis could also threaten the surface world however Magnus is able to help. Magnus and Ranna makes an understanding to help and she revives rest of the gang. Magnus manages to save the city with the help from Gregory Magnus meanwhile Will tries to breakdown Adam's plan that can cause huge trouble.
Amy lets her temper get the best of her when Mr. Piper refuses to admit he was wrong. P.J. decides to have a man to man talk with Skyler's old beau. Charlie's first ballet lesson may be her last after Bob breaks one of the class rules.
Complications and distractions abound when the CHAOS agents infiltrate an arms dealer’s Russian compound with the intent to capture him. Posing as lawyers, the agents must put their improv skills to work.
Toby goes undercover to help expose the identity of a hacker known as “Jericho-11” in a cyber crime investigation involving large-scale identity theft.
Merlin sets off on a journey to find a sword suitable for a king by seeking out a legendary sword maker. A conversation with Guinevere changes Arthur and he begins to assert his power by sparring with Leontes.
When a 13-year-old girl is admitted to hospital after a road accident, Monroe believes there is little chance of saving her and an operation could leave her severely damaged. However, her father begs him to operate and give her a chance to live - whatever the consequences. The trainees face their final assessments and Shepherd considers leaving following his break-up with Bremner.
Owen returns with information on one of Percy’s black boxes. Nikita returns to London with him to retrieve it but notices that Owen is acting strangely. Owen tells Nikita that he wants to release the contents of the black box and when Nikita disagrees, he turns on her. Meanwhile, Percy finds out Nikita is in London and dispenses Michael to kill her. Also, Amanda overhears Jaden arguing with Alex about the escape tunnels so she hooks Alex up to a lie detector to get the truth out of her once and for all.
With new challengers on the swamp, the race to catch the biggest gators quickly has never been tougher. But more speed means more danger. Legendary Cajun Troy Landry, and his son Jacob, are struggling. Without their old sharpshooter Clint, the gator count is beginning to lag, and the boys are growing more and more frustrated.
A contestant is eliminated; Rihanna performs; Kelly Clarkson and Jason Aldean perform.
A "Bowled Over" obstacle brings full body contact to bowling. Contestants also face the Chocolate Shop and an Arabian Nights-theme challenge.
As cancellation looms for "TGS", Liz snoops with Kenneth to find a missing Tracy. Meanwhile, Jack works his magic to ensure the financial success of Jenna's newest endeavor; and an emasculated Pete organizes a manly contest for the writers and crew.
The adventurers meet Emmy, a trainer who has yet to start her journey. Iris reveals her dream to be a Dragon Master.
With Desrae’s help, Cathy reinvents herself in Soho. Cathy and Eamonn are reunited but it ends in disaster and Eamonn is forced to flee the country.
The ladies participate in a marriage-equality march over the Brooklyn Bridge, yet there's drama with these mamas when tension heats up between Sonja and Alex. Elsewhere, an offensive remark delivered by Ramona spreads back to Cindy.
Meanwhile, Emma tries on a wetsiut belonging to a famous guest who is staying at the hotel, but gets stuck and can't take it off.
Neil encounters a celebrated warrior from 300 BC, owner of the finest Iron Age sword ever discovered. He tries his hand at divination in an effort to discover the power of Celtic priests and searches into his own DNA for clues to Celtic identity.
As the high school prepares to throw a “1960s Decade Dance,” Elena starts receiving disturbing messages from Klaus via an unusual source. Bonnie tries to reassure Jeremy that she is strong enough to help Elena, but a worried Jeremy asks Stefan for advice. Caroline talks Matt into taking her to the dance. Expecting Klaus to show up at the dance, Damon and Alaric attend as chaperones, but Klaus is playing a complicated game that keeps them on edge. Finally, Damon comes up with a new plan of action that shocks and upsets everyone.