SpongeBob and Patrick learn the secret origins of Mermaid Man and Barnacle Boy from the heroes themselves.
Plankton grows himself another eye because he lacks depth perception. However, it changes his personality and causes him to be nice, because the eye is from SpongeBob's DNA.
On the 10th anniversary of 9/11, Mac and the team remember specific moments from that day that were indelibly burned in their mind.
Jocktopus reveals that it is his father's dream for Jocktopus to sing in a musical play about potatoes. So during the Freshwater High musical play, "Potatoes In Winter," He goes in the play to sing but gets nervous. Note: This is in two parts, usually listed as episodes 138 & 139. Disney still lists this as the season final, even after showing 3 more episodes after it.
Karl makes his way through the 'Bucket List' that has been created. First up he ends up spending a a night on a private island.
Split into two teams, the designers are asked to create outfits for up-and-coming band The Sheepdogs. They have $300 and two days to complete their looks.
Leslie is torn between Ben and her dreams of running for public office, while Ron braces himself for the arrival of his first wife, the original Tammy.
Robert California stops by for the first time as CEO and leaves behind a mysterious list that has a line down the middle and every member of the office on either one side or the other. The office members frantically try to figure out what it means. Meanwhile, the new manager Andy faces a crisis.
As Jeff tries to keep Pierce from rejoining the study group, Dean Pelton faces off with Vice Dean Laybourne for control of Greendale.
In an effort to distance herself from the Circle and establish a normal teenage life in Chance Harbor, Cassie befriends Sally Matthews, a non-witch. Concerned their powers are getting out of control, Diana pushes everyone to bind the Circle, but Faye is thrilled with the increase in her powers and refuses to participate, while Melissa flirts with Nick despite Faye's warnings. Meanwhile, Adam fights his growing feelings for Cassie, but circumstances continue to throw them together, forcing Cassie to make a decision.
News of Meredith and Derek's unsteady relationship raises a red flag for Zola's adoption counselor; Alex quickly realizes that he has become the outcast of the group after ratting out Meredith; and Cristina makes a tough decision regarding her unexpected pregnancy. Also, Chief Webber brings Henry in for a last minute surgery, alarming Teddy. This is an historic episode that finally crosses a long-standing barrier.
When the social security number of a young prosecutor comes up, Reese and Finch work together to figure out if their person of interest is the victim or perpetrator.
Penny is worried with how damaged her friendship with the guys will be in the aftermath of her sleeping with Raj while Sheldon becomes the leader of the paintball team.
The fifth-year residents return for the first day of a year that will make or break their careers: Meredith faces the consequences of tampering with Derek's clinical trial and is terminated at the hospital; April tries to step up to the plate as Chief Resident in the wake of a giant sinkhole in the middle of Seattle; and Cristina and Owen are still at odds over their drastically different feelings for their unborn child.
A fight between Sheldon and Penny leaves Amy caught in the middle, while Leonard tries to spice up his long-distance relationship with Priya.
Klaus puts a plan in motion that will give him even more power, but even with the unwilling participation of werewolf Ray Sutton, things don’t go exactly as Klaus had planned. Damon and Alaric reluctantly go along with Elena’s new strategy to find Stefan, leading Damon into a dangerous fight with an unexpected enemy. Jeremy turns to Matt for help as he continues to try to understand what the ghosts from his past want from him. Unaware that Caroline is in need of his help, Tyler faces an emotional confrontation with his mother.
In prison for killing his nemesis, Patrick Jane must prove that the man he shot really was Red John. Meanwhile, Lisbon urges Van Pelt to seek counseling in the aftermath of the death of her fiancé.
Dee and Dennis take the gang to their favorite childhood vacation spot where things aren't quite how they remember. While Dee and Dennis see the seedy side of the Jersey Shore, Mac, Frank and Charlie have the nights of their lives.