Howard has an internal struggle about opening a letter from his father; Leonard and Penny decide to throw a "grown-up" cocktail party at the apartment.
Haley and Dylan make plans to quietly elope before the birth of the babies; Jay courts an Instagram celebrity as he tries to get his new business started.
Cam is asked to preside over the high school graduation ceremony, while Jay gives the commencement speech; Claire encounters her former high school rival.
SpongeBob and Patrick fly their brains like small drones; SpongeBob and Patrick pretend to be their favorite heroes until the real heroes' enemies arrive.
Mr. Krab decides to host a talent show and invite everyone; SpongeBob is determined to prove that Plankton is only evil due to how he's treated by others.
When the Krusty Krab encounters a storm, Mr. Krabs makes his workers and customers return to their homes; Patrick is afraid to lose his final baby tooth.
SpongeBob accidentally puts all the residents of Bikini Bottom on Santa's "naughty" list as part of one of Plankton's plots to get the Krabby Patty formula.
When the Lair floods, April goes to save Splinter. To make matters worse, the mutant called Goldfin comes with a warning - stay out of his way, or else!
Donnie and Wingnut go to restore power to the Lair but get trapped by the East River 3! The water is rising and they're not alone - there's a monster down there
Max gets some guidance from a farm dog as he tries to protect a toddler, who is the newest member of his family, and Snowball goes on a dangerous mission.
Members of a spooky and mysterious family begin preparing for a visit from their even creepier relatives, but trouble starts to brew with a TV personality.
SpongeBob and Mr. Krabs try to get the Krusty Krab's grill back from some kids; The Krusty Krab's customers crave something creepier than usual at night.
SpongeBob accidentally puts all the residents of Bikini Bottom on Santa's "naughty" list as part of one of Plankton's plots to get the Krabby Patty formula.
SpongeBob and Patrick launch an advertising campaign for the Krusty Krab; Mr. Krabs & Plankton petition the city to see what restaurant will be bulldozed.
Monica and Rachel are tired of their new apartment, so they try to bribe the boys into taking it back; Ross asks Emily to marry him, much to Rachel's chagrin.
The friends head to London for Ross's wedding; Chandler is annoyed when Joey buys a ridiculous hat while touring London; Rachel decides to attend the wedding.
When a new and exciting job opportunity overseas is offered to Leonard, it causes Sheldon to become jealous of his success and throws Penny for a big loop.
Calvin and Dave try to retrieve Grover's stolen Christmas present; Tina talks about Malcolm and Marty's childhood Christmas traditions to the children.