While investigating an old corrupt Division program, P9, that seems to have resurfaced, Nikita and Michael run into Owen. He tells them he is searching for Dr. Joseph Mars, who is not only the mastermind behind P9, but also invented the Regimen and could help Owen wean himself off the dangerous drug. Michael is hesitant to trust Owen again but Nikita decides the three should join forces. Percy demands to see Alex.
When Mount Justice itself is attacked, can Artemis and Robin (the two teens without super-powers) save the Team (or even themselves) from the unknown invaders?
When the leader of the Gungans, Boss Lyonie, is injured it's discovered there is an uncanny resemblance between the Boss and Jar Jar Binks. Binks must sway his people from rising against the Naboo and stopping a Separatist invasion led by General Grievous.
When Danny is put on modified assignment after an incident in which a cop—who failed to identify himself—is shot, he faces Internal Affairs investigators, who are looking to his state of mind on that day for further implications.
SpongeBob gladly accepts to house sit Sandy's Treedome, while she is away. Sandy first shows SpongeBob what he should do, and all is quiet until Patrick arrives for a visit. The best friend causes chaos and wreak havoc, which results to the house getting destroyed.
Squidward and SpongeBob win backstage passes and tickets to Kelpy G's live concert. However, Patrick eats their passes shortly after the concert begins. Losing their passes, SpongeBob and Squidward try to sneak backstage to meet Kelpy G.
Ron's first ex-wife, Tammy One, reenters his life and tries to control his every move. Meanwhile, Ben helps Tom balance the books at his new company, and Ann makes a PSA, with help from Chris.
The chief makes a decision that shocks everyone at Seattle Grace; Owen and Cristina attempt to find normalcy; April struggles in her new role; the 5th-year residents receive their first solo surgery assignments.
A cute jock named Luke asks Cassie to the school dance, and after watching Adam spend time with Diana at the boathouse, she accepts his offer. Meanwhile, Melissa sees the dance as an opportunity to get closer to Nick. Faye, on the other hand, has no plans to go and remains focused on finding a way to control her powers. Dawn discovers someone from their past, an intense man named Zachary, is in town asking questions about the Cassie and the Circle, so she asks Charles to keep an eye on him.
With Lisbon suspended and the rest of the team reassigned, Jane is reinstated as a CBI consultant and forced to work with a new team. During the investigation, Jane conspires to bring his former team back together.
Reese and Finch question the machine's reliability when they are asked to investigate a teenager who was killed years earlier; Finch remembers the origin of the machine.
Klaus and Stefan arrive in Chicago, where Stefan is reunited with a vampire who hasn't really moved on from her interest in him decades earlier. In a flashback to Chicago in the 1920s, Stefan comes face-to-face with a shocking chapter from his wild past. After Damon gets a tip on Stefan and Klaus' whereabouts from an unexpected source, he and Elena follow their trail. Back in Mystic Falls, Tyler is concerned about Caroline and turns to Sheriff Forbes for help.
As Annie competes with an overachieving rival in a Model United Nations competition, Jeff wrestles with his feelings for his ambitious friend.
Leonard and Amy get to know each other better, while Howard and Bernadette spend the weekend with Mrs. Wolowitz.
After Robert California challenges the Dunder Mifflin staffers to double their sales, Andy, taking matters into his own hands, creates an incentive program. Eventually, he promises to tattoo himself if the staff doubles their sales. Meanwhile, Pam strikes up an unlikely friendship with Angela, both of whom are pregnant.
Frank finds himself in the child beauty-pageant business and fears that people might think that he's in it for the wrong reasons. Meanwhile, Dee wages war on stage moms, and Mac, Dennis and Charlie think they have found a contestant to back.
Cooper, Sam, Amelia and Charlotte try to save Pete's life after his heart attack; Addison's desire to have a child leads to a surprising encounter; Sheldon hopes to help Amelia with her alcohol addiction.
In this episode, David is joined by Gregg Wallace and Nigel Havers, and Lee Mack is joined by Charlie Brooker and Nina Wadia.