"Grandmum's the Word" is a SpongeBob SquarePants episode from season eleven. In this episode, Plankton tells his grandma that he owns the Krusty Krab, but must keep the lie going when she comes to visit.



The episode starts off with Planton pampering Karen and giving her a mud bath. As Plankton and Karen are about to kiss, Karen's screen turns off and is replaced with a call from Plankton's grandmother. It turns out that Plankton promised to own the Krusty Krab by her 90th birthday, and her birthday is tomorrow and she is coming to visit the Krusty Krab. Because of this, Plankton has to lie and keep the lie going when she visits. Plankton explains to SpongeBob and Mr. Krabs the situation, and after explaining it in a sincere way, SpongeBob and Mr. Krabs agree to give the Krusty Krab a Plankton-themed makeover.

The next day, Plankton's grandma visits the now-Plankton-themed Krusty Krab to take a look.

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The episode was confirmed by Vincent Waller on November 12, 2017.[1]


Grand Mums the Word Rough

Grand Mums the Word Rough

Grand Mums the Word Final

Grand Mums the Word Final


 ) Associated production music
 ) Original music
 ) SpongeBob music
  Earl's Revenge - Sage Guyton, Jeremy Wakefield [Title card.]

  Esta Noche (a) - Hans Ehrlinger [Plankton pampering Karen.]
  Nude Sting - Nicolas Carr ["Grandma?!"]
  Lite Conversation - Nicolas Carr, Barry Anthony [Plankton's grandma talks to Plankton.]
  Drama Link (b) - Hubert Clifford [Plankton thinks about lying to his grandma.]
  Lite Conversation - Nicolas Carr, Barry Anthony [Plankton claims to his grandma he owns the Krusty Krab.]
  Esta Noche (a) - Hans Ehrlinger ["Now bring back Ray-Ray."]
  Hot Steel and Slide Licks (h) - Jeremy Wakefield ["What am I gonna do, Karen?"]
  Cartoon Sting 5 - Karen kicks Plankton out of the Chum Bucket.
  Sailor's Sting 4 - Michael Bolger, Nicolas Carr [SpongeBob playing with the signal of the Krusty Krab.]
  Hot Steel and Slide Licks (o) - Jeremy Wakefield ["SpongeBoob, you gotta help me!"]
  Cartoon Sting 7 - Plankton explains his situation to SpongeBob.
  Hot Steel and Slide Licks (z) - Jeremy Wakefield [One pathetic sob story later...]
  Tabu - Daryl Griffith [Plankton's sincere face.]
  Lap Steel - Nicolas Carr [SpongeBob gets happy.]
  Sailor's Sting 12 - Michael Bolger, Nicolas Carr [Krabs swallows the Krabby Patty secret formula.]
  Hot Steel and Slide Licks IXV - Jeremy Wakefield ["Pronto!"]
  You're Nice - Sage Guyton, Jeremy Wakefield [SpongeBob and Squidward modifying the Krusty Krab for Plankton's grandma.]
  Stupid Cupid - Ronald Hanmer [Plankton's grandma arrives at the Krusty Plankton.]
  Hot Steel and Slide Licks (m) - Jeremy Wakefield [Squidward sleeping.]
  Co Co Baby (a) - Gil Flat [Plankton's grandma falls in love with Squidward.]
  Hot Steel and Slide Licks (d) - Jeremy Wakefield ["Alright, lady, I don't normally say this, but get off my nose."]
  Pepito from Tampico (a) - Otto Sieben, Ronald Sekura ["So, Grandma Plankton, where have you been all my life?"]
  Kitsch Comedy - Peter Jeffries [Grandma Plankton at the kitchen.]
  Fanfare (a) - Krabby Patty is made.
  Kitsch Comedy - Peter Jeffries [Squidward chews the Krabby Patty for Grandma Plankton.]
  Hot Steel and Slide Licks - Jeremy Wakefield [SpongeBob, Krabs, Squidward and Plankton juck.]
  Cartoon Sting 4 - "You really are a master chef."
  Fooling Around - Barry Anthony [Plankton's grandma wants a photo of her with the secret formula.]
  Tabu - Daryl Griffith [; Plankton shows his sincere face to Mr. Krabs again.]
  Fooling Around - Barry Anthony ["Fine."]
  Target - Hans Ehrlinger [Plankton's grandma takes off with the secet formula.]
  Epic Struggle - Fredric Bayco ["Why? Why did I lie?"]
  Hot Steel and Slide Licks (b) - Jeremy Wakefield [Grandma Plankton returns to Shady Shoals with the secret formula.]
  ? [Grandma Plankton's world domination daydream.]
  Aloha Eo - Nicolas Carr, Sage Guyton, Jeremy Wakefield [Ending.]

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  • As of February 18, 2018, The Internet Movie Database (IMDB) gives this episode a rating of 9.1/10 based on 7 ratings by users.[2] users give this episode a rating of 0.0/10 based on 0 votes.[3]


  • One Pathetic Sob-Story Later...
  • Despite Plankton being born in 1942 like Mr. Krabs, his grandmother celebrates her 90th birthday in this episode.
  • The "The" in the title card is a different color than the other words in the title card.
  • Running gags:
    • Plankton making his sincere face.
    • Lily smacking people with her purse.
    • Lily flirting with Squidward despite her blindness.
  • This episode aired twelve years after "Dunces and Dragons" premiered in Australia and nine years after "Shuffleboarding" and "Slide Whistle Stooges" premiered.
  • This is Lily Plankton's first appearance since "Gramma's Secret Recipe."
  • This is the third time that Ketchup is used as blood. The first time is in "To Save a Squirrel," and the second time is in "Stuck on the Roof."

Cultural references

  • The title is a play on the English idiom "mum's the word," an indication that something is to be kept a secret.


Grandmum's the Word error close-up

Production error

  • In "Gramma's Secret Recipe," Lily has two eyes. However, she only has one eye in this episode.
    • She may have had surgery before this.
  • On the Galley Grub sign, "Krabby Patty" is misspelled as "Krabby Pattie."
  • During the scene with all of the Bikini Bottomites groveling to Lily, red numbers appear on the screen for a second.
    • Also during that scene, Mr. Krabs' eyelashes are missing.


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