After a freak jousting accident at a Medieval Times-style restaurant, SpongeBob and Patrick are transported to a medieval version of Bikini Bottom. There they are mistaken for great knights and sent on a quest by King Krabs to rescue his daughter, the Princess Pearl, from the clutches of the evil wizard Planktonamor.
It's Dog River's centennial birthday, and Hank wants to honour the town by recreating it in Lego. His quest for artistic perfection causes him to take some drastic steps when he runs out of Legos for his scale-model. Wanda has a birthday as well, and doesn't want anyone to celebrate it. And Karen becomes the town laughing-stock when people find out that she was involved in a sport that no one had ever heard of before.
Sam demands a transparent investigation into the death-in-custody of small-time drug dealer Billy Kemble. He believes that if the police don't police themselves, the public will never trust them. When the explosive evidence of what happened to Billy falls into his hands, Sam has a huge decision to make. This evidence could tear the team apart. It's an opportunity to destroy his world and the people in it, but also perhaps an opportunity to get home.
A new lineup takes their seats, but old foes can't stay out of each other's way. Freddy Deeb, Fred Chamanara, and Johnny Chan join Daniel Negreanu, Eli Elezra, Sammy Farha, Dr. Amir Nasseri, and Doyle Brunson for another High Stakes Poker cash game.
Emma's life, especially at home, is complete chaos and she feels she's losing control of everything, desperate to find an answer she finds a solution after Manny mentions that she's fat. Meanwhile, Snake tries to get back with Spike.
Raven, Chelsea, and Eddie volunteer to run clubs for Mrs. Valentine's class at the Community Center. While there, Raven must deal with mentoring an obnoxious little girl named Sydney (Sydney Park). Raven finds out that Sydney never knew her real parents, and eventually they grow a sisterly bond.
Orel learns that people should do everything they can to keep their wives happy. He goes around town and asks women including his mother, what they want.
Nikki falls for a new guy named Stone, while Jonesy is beaten by a twelve-year-old at an arcade game.
Edie thinks that Karl is going to pop the question after she finds an engagement ring and prenuptial agreement in his briefcase. Also, Gabrielle and Carlos learn she is highly unable to conceive a child again because of complications caused from her recent miscarriage. Lastly, Bree's problem with alcohol intensifies with the notice of Lynette after Bree babysits her children.
Derek and Addison's relationship is rocked to the core when a former friend comes to Seattle Grace and his presence promises to shake things up for a few members of the staff. Burke and Cristina's relationship is affected when one of her secrets is outted. Alex and Izzie are having similar reactions to their closet scenes during the Code Black crisis. On top of this a cocky doctor shows up to piss Derek off in all kinds of ways. A patient is suffering from constant orgasms and her condition sparks interesting conversations among the staff. George is trying to figure out how to get Meredith to see him as more than just a housemate. Another patient, that Derek is treating, is dealing with a rare disorder and needs his parents support and understanding. Burke has a patient who inspires him to talk to Meredith and Cristina about doing what they say they will. Meanwhile, Meredith learns more about her family (in fact maybe more than she may have wanted to know) through her parents.
Hal learns that his father has passed away, but sheds no tears and passes it off as nothing since he never knew him. So, to make sure nothing like that happens again, he lets the boys do whatever they want by letting them miss school and even offering to buy Malcolm a new car, until Lois puts a stop to it. Noticing how depressed Hal has become, his friend Abe brings George Takei over for a visit in an attempt to cheer him up.
Tina takes a business trip to Canada and has a chance to explore her feelings for the opposite sex. Dana's treatment puts a strain on her and Lara's relationship. Meanwhile, Jenny helps Moira in her transformation to Max, Carmen and Shane dedicate parts of their bodies to each other, Alice reverts back in her obsession over Dana, and Kit takes control. In a special appearance the B-52's perform at The Planet.
When Riley's affinity for grafitti goes too far, Grandad sends him to an art teacher that actually encourages him to do grafitti, only painting murals instead. Meanwhile, Huey discovers a black woman died from watching too much black TV, and decides to watch black TV for 2 weeks to see if that was the cause.
Paige learns the difficulties of dating a mortal when Henry becomes too involved in the magical world and is torn when another suitor arrives hoping to convince her to marry him so they can become the ultimate magical couple. Meanwhile, Billie finally finds her missing sister, Christy; Piper faces a romantic decision when she runs into an old flame and begins to wonder if she should move on with her life.
While helping to create a memorial garden for a woman who intends to re-marry her former husband, Rosemary and Laura are surprised to find an abandoned baby under a gooseberry bush. While the pair wonder who the mother is as they get on with the garden, a gunshot soon leads them to the body of a noted artist, leaving them wondering if the murder and the abandoned child are possibly connected...
The League comes to the aid of Boston Brand, the ghost of a deceased circus acrobat, who needs their help in recovering the souls of members of a monastic order.
Josh gets a part on a TV crime show where he plays the infamous "Theater Thug." Following his TV debut he becomes a public enemy as a case of mistaken identity gets out of hand.