Justin and Ben argue over a plea bargain while Kate visits her old school.
Dick Roman acquires Frank's hard drive that contains sensitive information about the Winchesters and gives it to an unsuspecting brilliant hacker named Charlie telling her she has 3 days to crack the encryptionl or she is fired. Sam and Dean are tipped off that Dick has the hard drive and race to get to Charlie before she breaks the code. Meanwhile, Bobby tries to help the brothers, but his rage towards Dick for killing him starts to get in the way.
As Nick delves into the trailer's weapons cabinet and his inner Grimm, the investigation of a dead construction worker leads him into a long-standing conflict in the creature world.
Jessie has her hands full trying to keep a watchful eye on Emma, who has a major crush on bad boy with a bad reputation, Vincent. Meanwhile, Zuri becomes too protective of her favorite tree in Central Park.
Paul the Delivery Guy discovers his job has a higher calling to save Danville as he makes stops at Phineas and Ferb's house, Doofenshmirtz Evil, Inc., Danville City Hall and the OWCA, in a special episode seen through his eyes. The rock band, Love Händel, returns for some musical accompaniment. Meanwhile, at Doofenshmirtz Evil Inc., Perry has lost the tools in his hat.
The teams on both sides fight on for a common cause, and there are shocking developments tied to the Cortexiphan children.
Danny and Jackie are assigned to protect a key witness in a Russian mob trial, but when an attempt is made on her life, they realize there is a leak on the task force. Meanwhile, Erin is offered a job as deputy mayor, which would have her working directly with her father.
Nikita convinces a reluctant Birkhoff to use 20 million dollars of his own money in a plan to bankrupt Percy and Division, but when Percy ends up stealing Birkhoff’s entire life savings, Birkhoff and Nikita clash. Team Nikita has one last chance to hit Percy again, but Birkhoff is arrested trying to regain his millions and Nikita realizes she must break him out of jail before Division gets to him. Michael and Alex go after Birkhoff’s stolen money while Nikita goes to save Birkhoff.
Mike Strauss' body is seized, Ike reacts to a break-in, and Victor plots to get his wife out of Cuba. Vera secures Jackie Kennedy for a charity event but laments not having children with Ike.
When DoorMouse is launched into outer space on a path headed for Mars, it's up to Milli, Geo and Bot to save DoorMouse and return him to Earth. Along the way, the team encounters speeding stars, mysterious aliens and massive meteors.
In a desperate bid to prove his manliness, Lee joins Tim, Daisy and Lucy on a camping weekend in the middle of a dark spooky forest.
With the exterior of the Harriet Project completely restored, interior designer Nicole Curtis and the guys move inside and begin demolition to prepare for pluming and electrical work in this episode of Rehab Addict. Focusing on the upper unit's bathroom, Nicole uncovers a hidden clawfoot tub that she falls in love with and must restore.
Harriet is doing odd jobs round the nursery and Timmy is eager to help out. He finds a yellow beret (the closest thing he can find to Harriet's yellow hard helmet) and a toy tool belt and begins his round of odd jobs. Unfortunately his attempts at mending his friends' toys result in disaster: a wheel falls off Mittens' hobby horse, Ruffy's robot breaks and Ruffy's remote control car just grinds to a halt. Finally Harriet takes matters into her expert hands, and together her and Timmy make amends. Timmy learns how to mend things the right way with the right tools, and Harriet rewards him with a proper yellow hard hat of his own.
An accountant and his principal contact Nero Wolfe: the first one accuses the charming Lara Fox of the theft of the salaries of a troupe of Carosello; the second defends the actress because he loves her. Not only is Lara exonerated by Wolfe, but she proposes herself as a client: her father and four others during the war entered into the "Covenant of the Six" with an English lord, Clivers, to help him escape from a prison. Freedom to them, a rich reward to them. The man never honored the debt: Wolfe's task is to help the survivors and their heirs to collect the sum until Clivers is in Rome. When Sordillo, another member of the Six in town to talk to Wolfe, is shot dead, Wolfe suspects that Clivers has something to do with it. Graziani, meanwhile, has found the wages of the troupe in Lara's car and intends to arrest her, but Wolfe hides the actress at home and so saves her. Then with the help of Archie Goodwin organizes a close confrontation with the lord, which surprisingly claims to have already paid the debt years earlier with another member of the Six, Meduni. Which, however, has long since disappeared. The version of Clivers is credible, even more so when Archie explains to Wolfe that the last survivor of the Six, a security guard named Sgroi, was strangely .
Martin attempts to find Teller’s mysterious workshop and winds up aiding another professor, Logan, to win big at poker. Meanwhile, a young Italian man creates a viral video to track down the love of his life, whom he only met in passing, and a city slicker who plans to sell off his dead father’s ranch, winds up learning a lesson from a horse that makes him appreciate the rural life his father chose. Then, Martin’s sister-in-law, Abigail Kelsey, visits Clea and Jake at the board-and-care facility, much to Martin’s dismay.
After eight years of practice, the residents head to San Francisco for their oral boards; sparks fly between Catherine and Richard when they bump into each other at the hotel; Bailey intervenes after Owen and Teddy get into a heated argument about their young car crash patient; and Mark tries to recruit Lexie for one of his cases. Meanwhile, Alex feels guilty for being away from the hospital when Tommy's health begins to fail.
Reese goes undercover as an armored car company employee, and faces memories from his past with the CIA.
Alaric finds an unexpected ally to guide him on his dangerous new path, while Damon and Meredith try to figure out what their next move should be. At the school’s 1920s Decade Dance, Bonnie asks Jamie to go with her and, at Caroline’s suggestion, Elena asks Stefan to be her date. Caroline is pleasantly surprised when Tyle shows up at the dance determined to sweep her off her feet, but Klaus does his best to come between them. The dance takes a deadly turn when Damon and Stefan realize they need the help of Matt, Jeremy and especially Bonnie to undo a spell that could prove devastating for everyone.