Season 4 · Episode 10 — Enemy In-Law
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 break up the ill-favored fling.
Season 4 episodes
E1Plankton 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 chase…
E2Mr. 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 fo…
E3Mr. Krabs complains that his back hurts, so SpongeBob and Patrick buy a new mattress and Squidward tries to take credit for it. They give t…
E4Plankton 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…
E5Mr. 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 SpongeBo…
E6It's Sunday and Squidward just wants to relax. But when SpongeBob and Patrick elect him as Good Neighbor President, they won't leave him al…
E7Mr. Krabs sells the Krusty Krab to a conglomerate that plans to turn it into a big corporate chain.
E8Squidward fools SpongeBob into thinking that he has a laughter-related illness and convinces SpongeBob that if he laughs one more time in t…
E9The adventures of Mermaid Man and Barnacle Boy are being told in a thrilling new motion picture. But after SpongeBob learns the heroes will…
E10Mr. 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 hor…
E11After Patrick accidentally falls off a cliff while jellyfishing, he wakes up with superior intellect.
E12Sandy's experimental teleportation device malfunctions, melding SpongeBob and Squidward into one body.
E13While trying to beat a paddle-ball world record, SpongeBob forgets to feed Gary -- for 10 days. Gary runs away to downtown Bikini Bottom wh…
E14After a freak jousting accident at a Medieval Times-style restaurant, SpongeBob and Patrick are transported to a medieval version of Bikini…
E15After 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…
E16Mrs. Puff gets fired from her boating school job due to her lack of passing Spongebob. Instead, a more-intense new instructor takes her pla…
E17The Chimpanzee beneficiaries of Sandy's undersea treedome are paying a visit to see what progress she has made with her inventions. But San…
E18The Flying Dutchman takes up residence at SpongeBob's house where he proceeds to scare, startle and surprise SpongeBob around the clock. Ev…
E19Mr. Krabs wants to give his daughter Pearl the best birthday ever. While he works on the party, SpongeBob is assigned the task of figuring…
E20SpongeBob receives an invitation to take part in a competition on mysterious Karate Island for the chance to be crowned "King of Karate." S…
E21When 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…
E22Mr. Krabs makes SpongeBob go down the new wishing well after experiencing one for himself, and Patrick and Squidward accidentally join in.…
E23In the battle for fast food supremacy, Plankton has decided to throw in the towel and start a new business selling trinkets and souvenir gi…
E24Gary starts biting everyone in town, starting with Squidward. When Squid asks if Gary has been up-to-date on all of his snail shots, Sponge…
E25While Squidward is playing the clarinet, he accidentally swallows the reed. SpongeBob and Patrick take a microscopic submarine to try to re…
E26Mr. Krabs forces SpongeBob to take a vacation, but he doesn't know how. Meanwhile, Patrick takes SpongeBob's place as fry cook.
E27SpongeBob is going to have the best day ever. But when work, karate, jellyfishing and Squidward's clarinet recital don't go as planned will…
E28SpongeBob finds an old-time wig and starts wearing it everywhere he goes.
E29A misunderstanding over a vacation getaway advertisement causes Patrick to think he must "get out of town" or face dire consequences. Spong…
E30After being covered in cement, the Bikini Bottomites are convinced that Squidward is an unknown species and SpongeBob tries to keep him as…
E31SpongeBob tries out his new magic kit on Squidward and is convinced he's turned his neighbor into an ice cream cone!
E32For 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.
E33Patrick's ancestors were adlings, so Patrick is the legal king of Bikini Bottom and now he reigns/misrules Bikini Bottom.
E34Patrick is jealous of SpongeBob's jellyfish net. When SpongeBob finds out that it's been stolen, he suspects Patrick is the culprit.
E35It's Best Friends Day, so Patrick and SpongeBob trade presents.
E36Take a look inside Patrick Star's rock, where we see that his morning routine is anything but ordinary.
E37After SpongeBob discovers that his breakfast cereal has an offer for a free toy, he mails his requests. But now the hardest part is upon hi…
E38After Patrick writes a song, SpongeBob helps him try to get it played on the radio.
E39When SpongeBob hears that a ferocious biker gang is coming to town, SpongeBob dons his leather jacket, warms up his bike, and prepares to p…
E40A 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 se…