第 4 季 共 40 集
播出时间：2005年5月7日
第 1 集 Fear of a Krabby Patty
播出时间：2005年5月7日
Plankton unleashes a new plan; to get the Krusty Krab to work 24 hours. SpongeBob thinks this is a dream, until he thinks he is being chased by killer Krabby Patties.
第 2 集 Shell of a Man
播出时间：2005年5月7日
Mr. Krabs is going to a naval reunion, but molts (leaves his shell) before he goes. He asks SpongeBob to go in his shell and imitate him for the reunion.
第 3 集 The Lost Mattress
播出时间：2005年5月14日
Mr. Krabs complains that his back hurts, so SpongeBob and Patrick buy a new mattress and Squidward tries to take credit for it. They give the new mattress to Mr. Krabs, but Mr. Krabs put his money in his old mattress, which SpongeBob, Patrick, and Squidward must find while Mr. Krabs is at the hospital.
第 4 集 Krabs vs. Plankton
播出时间：2005年5月14日
Plankton tries to steal the formula, but slips and sues Mr. Krabs. Mr. Krabs hires a lawyer, but his lawyer slips and is hurt, so SpongeBob must try to help Mr. Krabs win the case by trying to open a briefcase that has something very important in it.
第 5 集 Skill Crane
播出时间：2005年5月21日
Mr. Krabs gets a new toy vender by the name of "Skill Crane." At first, Squidward doesn't like it, but when Mr. Krabs lets him and SpongeBob give it a try, Squidward becomes obsessed with it. Can he win anything from the Skill Crane before it ruins his life?
第 6 集 Good Neighbors
播出时间：2005年5月21日
It's Sunday and Squidward just wants to relax. But when SpongeBob and Patrick elect him as Good Neighbor President, they won't leave him alone. Squidward installs an alarm system in which he thinks will "get rid of the threat." But when it malfunctions after SpongeBob and Patrick's apology cake is dropped on it, it goes on a rampage. Can Sponge and Pat get the house back to normal while Squidward just enjoys the rest of his Sunday?
第 7 集 Selling Out
播出时间：2005年9月24日
Mr. Krabs sells The Krusty Krab to a conglomerate that plans to turn it into a big corporate chain. At first the sell out brings the kind of peace and quiet Krabs always wanted. But his early retirement quickly turns into nothing more than one boring day after another, and Krabs finds himself living a life without purpose. So he takes a job as a busboy at the Krusty Krab only to find that it has been transformed into a heartless mockery of his former restaurant. With the help of SpongeBob and Squidward, Krabs stages a fast food coup against the new management.
第 8 集 Funny Pants
播出时间：2005年10月1日
Squidward has had enough of SpongeBob's incessant laughter, so he tricks his neighbor into believing that SpongeBob has a laugh-related illness. According to the made-up disease, if SpongeBob laughs one more time in the next 24 hours, his laugh box will explode and he will never laugh or giggle again. For the rest of the day, SpongeBob fights every single urge to chuckle. The next morning, SpongeBob discovers that he has completely lost the ability to laugh. Now, utterly greif stricken, all SpongeBob can do is cry his eyes out.. Will SpongeBob ever regain the ability to laugh?
第 9 集 Mermaid Man & Barnacle Boy VI - The Motion Picture
播出时间：2005年10月8日
The adventures of Mermaid Man and Barnacle Boy are being told in a thrilling new motion picture. But as SpongeBob and Patrick soon learn, their heroes are not in the movie. The real Mermaid Man and Barnacle Boy were considered too old, so their filmic counterparts will be two young actors that are nothing like the heroes. SpongeBob is outraged, and he sets out to make his own version of the Mermaid Man and Barnacle Boy movie using the real guys fresh from their retirement home.
第 10 集 Enemy In-Law
播出时间：2005年10月15日
Mr. Krabs' Mom is dating again, and it seems like things could be serious. Krabs tries to be happy for his mother, but he is absolutely horrified when he learns that the secret paramour is his arch-rival Plankton! Convinced that this just another trick aimed at getting the family formula for Krabby Patties, Krabs tries to reveal Plankton's schemes and breakup the ill-favored fling.
第 11 集 Patrick SmartPants
播出时间：2005年10月22日
When Patrick and SpongeBob are cheerfully jellyfishing, Patrick accidentally falls off a cliff. As he recovers, Patrick is now talking in complete sentences. But Patrick isn't happy with jellyfishing anymore. SpongeBob has to get the old Patrick back.
第 12 集 SquidBob TentaclePants
播出时间：2005年11月5日
Sandy's experimental teleportation device malfunctions, melding SpongeBob and Squidward into one body. This makes working in the kitchen and behind the check out counter at the Krusty Krab a bit of an issue. But Squidward's main concern is his big clarinet recital that's just one day away. Unless Sandy can reverse the effects of her machine, Squidward will have to find a way to hide SpongeBob during his performance.
第 13 集 Have You Seen This Snail?
播出时间：2005年11月12日
While trying to beat a paddle-ball world record, SpongeBob forgets to feed Gary -- for 10 days. So Gary runs away to downtown Bikini Bottom where he is taken in by a kindly old woman who confuses him with one of her many deceased pets. Once SpongeBob realizes that he has neglected Gary, he sets out in a town-wide search for him. Meanwhile, as Gary is wrapped in comfy blankets and indulged in and endless assortment of snacks, he discovers a very dark secret about this sweet old woman...
第 14 集 Dunces and Dragons
播出时间：2006年2月21日
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. To keep them company, the King sends along Squidward, the court jester (who was recently thrown in the dungeon for not being funny)
第 15 集 Krusty Towers
播出时间：2006年4月2日
After Mr. Krab's gets a huge hotel bill he decides that he can make a profit from opening his own. When Patrick decides to visit the hotel Mr. Krabs demands Squidward to never deny a guest even the most ridiculous request, but after Patrick frustrates Squidward so badly he quits his job. Then he decides to check into the Krusty Towers.
第 16 集 Mrs. Puff, You're Fired
播出时间：2006年4月2日
Mrs. Puff gets fired from her boating school job due to her lack of passing Spongebob. Instead, a more-intense new instructor takes her place.
第 17 集 Chimps Ahoy
播出时间：2006年5月6日
The Chimpanzee beneficiaries of Sandy's undersea treedome are paying a visit to see what progress she has made with her inventions. But Sandy doesn't think any of her work will satisfy the chimps, and if they don't like what she's invented Sandy could lose her funding forcing her to leave Bikini Bottom. SpongeBob and Patrick decide to help their distraught friend by taking over her work and finishing her inventions.
第 18 集 Ghost Host
播出时间：2006年5月6日
The Flying Dutchman takes up residence at SpongeBob's house where he proceeds to scare, startle and surprise SpongeBob around the clock. Eventually all the spooky shenanigans grow old, and SpongeBob is no longer afraid of the Dutchman. This creates a panic for the old ghost who now fears that he has lost his scary touch. So SpongeBob decides to lend a hand and help the Flying Dutchman learn to scare people again.
第 19 集 Whale of a Birthday
播出时间：2006年5月13日
Mr. Krabs wants to give his daughter Pearl the best birthday ever. While he works on the party, SpongeBob is assigned the task of figuring out what Pearl would like for a present. So he trails her through the Bikini Bottom mall and takes note of everything she thinks is "Coral." Once Pearl arrives at her party she is horrified to find that her dad's miserly ways have won out again. What was supposed to be the most fun and fabulous event ended up cheap and lame. It looks like Pearl's birthday will go down in history as the worst one ever - until SpongeBob shows up with a truck-load of presents. Everything Pearl looked at in the mall was so Coral that SpongeBob bought it all - maxing out Mr. Krab's credit card in the process.
第 20 集 Karate Island
播出时间：2006年5月13日
SpongeBob receives an invitation to take part in a competition on mysterious Karate Island for the chance to be crowned "King of Karate." SpongeBob and Sandy arrive at Karate Island and it turns out that it was just all a set-up to make SpongeBob buy real estate.
第 21 集 All That Glitters
播出时间：2006年6月3日
When a customer orders the one thing that no one has ordered for years, the monster krabby patty, SpongeBob tries to lift it, but old Spat cracks in two. So he sells every single thing he owns (plus his clothes) for a new spatula, but the spatula refuses to flip a single patty, so SpongeBob tries to get his old spatula back. Will Spat forgive him? Will SpongeBob ever be dressed again?
第 22 集 Wishing You Well
播出时间：2006年6月3日
Mr. Krabs makes SpongeBob go down the new wishing well after experiencing one for himself, and Patrick and Squidward accidentally join in. So, will they be able to get out and watch everybody's wishes come true? Or will Mr. Krabs just make them stay down there when he enjoys the money?
第 23 集 New Leaf
播出时间：2006年9月23日
In the battle for fast food supremacy, Plankton has decided to throw in the towel and start a new business selling trinkets and souvenir gifts. He even renames his store from The Chum Bucket to The Chumporium. But Mr. Krabs doesn't buy the change for a second. He's determined to prove that this is nothing more than one of Plankton's elaborate schemes aimed at stealing the Krabby Patty formula.
第 24 集 Once Bitten
播出时间：2006年9月30日
Gary starts biting everyone in town, starting with Squidward. When Squid asks if Gary has been up-to-date on all of his snail shots, SpongeBob reveals that he's never done any of that before. This only sends Squidward into a panic. Does he now have some rare snail-related disease? Is this the end for Squidward?
第 25 集 Squidtastic Voyage
播出时间：2006年10月7日
While Squidward is playing the clarinet he accidentally swallows the reed and Spongebob and Patrick take a microscopic submarine to try to retrieve the reed from inside Squidward.
第 26 集 Bummer Vacation
播出时间：2006年10月14日
Mr. Krabs tells Spongebob to take a vacation and Spongebob doesn't know how to. Patrick takes his place while he is on vacation and Spongebob is constantly trying to go inside and help Patrick make Krabby Patties.
第 27 集 Best Day Ever
播出时间：2006年11月11日
SpongeBob is going to have the best day ever. But when work, karate, jellyfishing and Squidward's clarinet recital don't go as planned will his day be ruined?
第 28 集 Wigstruck
播出时间：2006年11月18日
SpongeBob finds an oldtime wig, and starts wearing it everywhere he goes. The citizens of Bikini Bottom think it's ridiculous and laugh at SpongeBob, but SpongeBob still thinks the wig is cool.
第 29 集 That's No Lady
播出时间：2006年11月26日
A misunderstanding over a vacation getaway advertisement causes Patrick to think he must "get out of town" or face dire consequences. SpongeBob can't bear the thought of his best buddy moving away, so he decides to do what he can to hide Patrick's identity from his "pursuers." After many failed attempts at disguises, they finally settle on the perfect one: Patrick is transformed into a girl, Patricia, to be exact. Patricia catches the eye of Mr. Krabs and soon she becomes the most charming waitress/waiter at the Krusty Krab.
第 30 集 The Thing
播出时间：2007年1月16日
After being covered in cement, the Bikini Bottomites are convinced that Squidward is an unknown species and SpongeBob tries to keep him as a pet.
第 31 集 Hocus Pocus
播出时间：2007年1月16日
SpongeBob tries out his new magic kit on Squidward and is convinced he's turned his neighbor into an ice cream cone!
第 32 集 Driven to Tears
播出时间：2007年2月20日
For the 58th time in a row, SpongeBob has failed his driving test, so Patrick takes a test and passes. But SpongeBob is angry that he did.
第 33 集 Rule of Dumb
播出时间：2007年2月20日
Patrick's ancestors were adlings, so Patrick is the legal king of Bikini Bottom and now he reigns/misrules Bikini Bottom.
第 34 集 The Pink Purloiner
播出时间：2007年2月20日
Patrick is jealous of SpongeBob's jellyfish net, of course, what he calls "Ol' Reliable." In the morning, SpongeBob finds out that his jellyfish net is stolen, and he suspects it is Patrick since he is jealous of SpongeBob because of his jellyfish net.
第 35 集 The Gift of Gum
播出时间：2007年2月20日
It's Best Friends Day so Patrick and SpongeBob trade presents.
第 36 集 Rise and Shine
播出时间：2007年2月20日
Take a look inside Patrick Star's rock where we see that his morning routine is anything but ordinary.
第 37 集 Waiting
播出时间：2007年2月20日
SpongeBob discovers that his breakfast cereal has an offer for free toy. After gathering the necessary proofs of purchase, SpongeBob mails his requests. But now the hardest part is upon him: waiting for the toy to arrive. So SpongeBob sets up camp right next to his mailbox, determined to be present when the mailman shows up with his treasure.
第 38 集 Sing a Song of Patrick
播出时间：2007年2月20日
Patrick writes an annoying song. SpongeBob, however, tells Patrick that the song is great, so they try to get the song played on the radio. The local radio station rejects them, but they manage to play the song after putting the recorder on top of the station's antenna. The song is heard throughout the town, which causes chaos. An angry mob forms and starts to chase the two.
第 39 集 Born to Be Wild
播出时间：2007年4月1日
SpongeBob hears that a ferocious biker gang is coming to town, only no one in Bikini Bottom seems bothered by the news. So SpongeBob dons his leather jacket, warms up his bike, and prepares to protect the town all by himself.
第 40 集 Best Frenemies
播出时间：2007年4月1日
A new Kelp Smoothie chain is opening up all over Bikini Bottom. The chain's smoothies are so delicious that soon everyone in town can be seen drinking one. But now that customers already have their smoothie, they don't need to buy a beverage with their Krusty Krab order. This could hurt Mr. Krabs' profits.
