Warning! This page contains spoilers of an episode that has recently released digitally in Canada, France and Israel. Do not continue reading if you wish not to be spoiled.
- SpongeBob SquarePants
- Patrick Star
- Squidward Tentacles
- Eugene H. Krabs
- Pearl Krabs
- Mrs. Puff
- Sheldon J. Plankton
- Andy Yellowtail
- HAZMAT Unit
- King Neptune (mentioned)
The episode begins at the Krusty Krab, where Mr. Krabs is greeting Mrs. Puff and Pearl, and Patrick is taking a long time to order something, much to Squidward's annoyance. SpongeBob delivers two Krabby Patties to Mrs. Puff and Pearl by spitting them out of his eyes. Out of nowhere, the Health Inspector shows up and declares the Krusty Krab to be a health hazard, due to him suspecting that someone in the restaurant having a case of the "Clam Flu". He puts the restaurant under quarantine, and locks everyone inside. This causes everyone, (except for SpongeBob), to run around screaming and panicking. Patrick then questions what a quarantine actually is, to which SpongeBob replies that it's like a "mandatory sleepover". Squidward debunks this, saying that a quarantine eventually makes everyone sick. Just then, Plankton comes out of a nearby soda cup, saying that he's abandoning "operation soda-jerk". He escapes via the restaurant's funnel, but is immediately vaporized by a hazmat fish, prompting everyone to stay inside.
Pearl complains about this, but Mr. Krabs states that back in his navy days, they would isolate the sicko and lock them in the freezer so that they can enjoy their good health. Mrs. Puff then asks if they let the sicko out of the freezer once he got better, to which Mr. Krabs states that they probably let him out eventually. Much to Mrs Puff's concern. Mr. Krabs asks if anyone is feeling sick, to which nobody responds, prompting him to use a pair a tongs as a threat. This causes Squidward to freak out and bump into a table, launching pepper in the air and into SpongeBob's nose, causing him to sneeze. Everyone assumes that SpongeBob has the disease, even though he doesn't. SpongeBob states that even though he doesn't feel sick, he'll go into the freezer willingly. He attempts to have an emotional speech, but is cut short when Mr. Krabs slams the door in his face. It's then revealed that SpongeBob is having a lot of fun in the freezer, sledding on a mountain of snow and eating Ice Cream. Everyone is relieved as they think the worst of it is over. Patrick looks over and notices that SpongeBob has an Ice Cream Cone, making him interested. Patrick then pretends to be sick by rubbing relish all over himself. This causes everyone to freak out and Patrick ends up getting locked in the freezer, but SpongeBob and Patrick end up having a snowball fight with Ice Cream.
Mr. Krabs, Squidward, Mrs. Puff and Pearl are sitting at a table, paranoid if anyone else has the disease. Squidward itches his arm, and Pearl accuses him of having the Clam Flu. Mr. Krabs throws Squidward in the freezer. Mrs. Puff then yawns, making Mr. Krabs freak out, as he locks her in the freezer as well. Pearl then remembers that she still had money leftover from last time she went to the mall. This makes Mr. Krabs think that the flu has poisoned Pearl's mind, and he locks her in the freezer too. In the freezer, everyone is meeting up inside of an igloo, and Squidward finds out that nobody there is actually sick, making Mrs. Puff deduce that Mr. Krabs is the one with the sickness, which makes Pearl cry. Squidward decides that the only option is to break out of the freezer and lock Mr. Krabs inside. Everyone agrees, except for SpongeBob, who is reluctant at first, but Squidward convinces him once he states that he can't make Krabby Patties if he's locked in the freezer.
Everyone busts out of the freezer, much to Krabs' surprise. Patrick tries to attack him, but Krabs shrinks himself down and hides under the grill. SpongeBob chases Mr. Krabs' under the grill and tries to convince him to go willingly, but Mr. Krabs refuses, and goes down a pipe leading to the grease trap. SpongeBob comes out from under the grill, covered in mold, and unaware of what to do. Patrick then lifts up the grill and shoves Squidward through the pipe leading to the grease trap, causing him to get covered in grease. After seeing Squidward, Mr. Krabs escapes the grease trap and runs into the dining room. Pearl gives chase, but Mr. Krabs gets stuck in her blowhole. Pearl sneezes him out, causing her blowhole to get plugged up. Patrick corners Mr. Krabs, and they begin to fight. During the fight, Mr. Krabs throws Patrick into the broom closet covering him in dust. Patrick then grabs Mr. Krabs with his tongue and throws him into a garbage can that Mrs. Puff is holding, but she puffs up, causing trash to fall all over her. Later that night, the Health Inspector returns to the Krusty Krab saying that he made a mistake and nobody is actually sick, only to find out that everyone has a different disease, and Mr. Krabs has a combination of all 5 diseases. The Health Inspector panics, yelling that everyone is sick. A team of Hazmat fish lock the Krusty Krab inside of a box, and airlift it over to the Chum Bucket, where it is dropped on top of the restaurant. Plankton is then heard begging everyone to stay away so he doesn't get sick, only to end up sneezing. Realizing he had the Clam Flu after all, as the episode ends.
|( ‣ ) Associated production music|
|( • ) Original music|
|( ◦ ) SpongeBob music|
• Drunken Sailor - Nicolas Carr [Title card]
• Cheap and Frozen - Michael Bolger, Nicolas Carr [Opening at the Krusty Krab]
• ? [SpongeBob laughs]
‣ Crime Scene - Frederick Charrosin [Health inspector enters the Krusty Krab]
‣ Crime And Danger Sign #2 - Hans Conzelmann, Delle Haensch [Health inspector says someone in the Krusty Krab is infected with the contagious clam flu and puts the restaurant under quarantine]
‣ Desperate Escape - Kenneth Essex [Krabs, Mrs. Puff, Pearl, Squidward and Patrick panic at the Krusty Krab]
• Vibe Q Sting - Nicolas Carr ["Wait, w-what's a-a... a quarter bean?"]
‣ Daisy Chain - Harold Smart ["Sleepover! Sleepover...!"]
• A Simple Conversation 2 - Nicolas Carr, Barry Anthony ["A quarantine means you're locked in here with a sick person, until we're all sick and miserable."]
‣ Dramatic Cue (D) - Ronald Hanmer [Plankton gets burned]
‣ Destination Unknown - Gregor Narholz [Plankton was burnt by a robot]
‣ Dramatic Cue (E) - Ronald Hanmer [Plankton moans in ashes]
• Hot Steel and Slide Licks 3 - Jeremy Wakefield ["But I have to cheer at the big game tomorrow!"]
• Pirate's Opus - Michael Bolger, Nicolas Carr [Krabs explains what he used to do with a sick person at the old navy days]
• What's This - Nicolas Carr ["You let them out of the freezer once they were better. Right?"]
• Humorous Conversation - Nicolas Carr, Barry Anthony ["Uh? I suppose someone let 'em out, eventually."]
‣ Dramatic Cue (E) - Ronald Hanmer [Squidward gets nervous]
‣ Dramatic Cue (H) - Ronald Hanmer [Squidward, Patrick, Mrs. Puff, Pearl and Krabs think SpongeBob is the sick person]
‣ Theme For Two Lovers - Kenny Salmon ["I'll go. I feel fine, but... I don't wanna risk infecting my friends."]
• Hot Steel and Slide Licks 1 - Jeremy Wakefield [Squidward screams hysterically and sprays his mouth with a spray sanitizer]
‣ Theme For Two Lovers - Kenny Salmon ["All I ask is that you remember me and who I was, full of live..."]
‣ Six Powerful Cues (B) - Wilfred Burns [SpongeBob screaming from inside the freezer]
‣ Jingle Bells B - Sammy Burdson, John Fiddy [SpongeBob skating inside the freezer]
• Drunken Sailor Solo Accordion-2 - Nicolas Carr ["Well, problem solved! Now let's seat back and wait for the old clear."]
‣ Alone And Lost - Norman Dane [Patrick sees SpongeBob eating ice cream inside the freezer]
‣ Dramatic Episode 1 - Kurt Rehfeld [Patrick pretends to have the clam flu to reunite with SpongeBob in the freezer]
‣ Jingle Bells B - Sammy Burdson, John Fiddy [SpongeBob and Patrick having an ice cream fight inside the freezer]
‣ Unease - Dick Walter ["Ah... We'll just have to be more vigilate now, anyone could be a carrier."]
‣ Dramatic Cue (B) - Ronald Hanmer [Pearl and Krabs think Squidward is a carrier of the clam flu and ends up in the freezer]
‣ Misty Menace - Max Saunders [Mrs. Puff yawns]
‣ Terror - Alan Braden [Krabs launches Mrs. Puff into the freezer]
‣ Hippomania - John Fox, Mac Prindy ["At least we know we're saved now, me baby beluga?"]
‣ Finger Of Fear - Fredric Bayco [Krabs throws Pearl into the freezer]
‣ Jingle Bells B - Sammy Burdson, John Fiddy [Igloo inside the freezer]
• The Fruitcake Vendor - Nicolas Carr, Barry Anthony ["Nobody in this freezer is actually sick?"]
‣ The Killing Ground (A) - Richard Harvey ["Well, if no one's sick in here, then the sick person must be..."]
‣ Misty Menace - Max Saunders ["I say we must out of here, trap Krabs and lock him away!"]
‣ Hot Fuzz 05 112 C - Steve Sechi/Big Fish Audio [SpongeBob, Patrick, Squidward, Mrs. Puff and Pearl escape from the freezer]
‣ Paroxysms I - Trevor Duncan ["You psychos are supposed to be in the freezer!"]
• Sponge Monger - Sage Guyton, Jeremy Wakefield [SpongeBob chases Krabs under the grill so he can get him into the freezer]
‣ Rescue - Cecil Milner ["He's in the grease trap!"]
• Slide Whistle Stooges - Nicolas Carr, Sage Guyton, Jeremy Wakefield [Patrick tries to get Squidward into the grease trap]
‣ Rescue - Cecil Milner [Squidward spits grease to Krabs at the grease trap]
• Slide Whistle Stooges - Nicolas Carr, Sage Guyton, Jeremy Wakefield [Pearl, Patrick and Mrs. Puff trying to catch Krabs to lock him into the freezer]
‣ Trap Door - David Lindup [Health inspector returns to the Krusty Krab at night and says nobody was actually sick]
‣ Scorched Earth - Trevor Duncan [Health inspector sees SpongeBob, Patrick, Squidward, Mrs. Puff, Pearl and Krabs extremely sick]
‣ Destination Unknown - Gregor Narholz [The Krusty Krab gets put on a mega quarantine]
• Drunken Sailor - Nicolas Carr [Ending]
- This episode was originally going to be titled "Kwarantine Krab" and "The Kwarantined Krab."
- This will be the third season 12 episode to premiere a year or longer after its sister episode premiered, after "Pineapple RV" and "My Two Krabses."
- This will also be the sixth episode to premiere a year or longer after its sister episode premiered, the first three that were not part of season 12 are "Gary Takes a Bath," "Goo Goo Gas," and "Yeti Krabs."
- This is the only season 12 episode not featured on The Complete Twelfth Season DVD, due to its plot unintentionally being similar to the COVID-19 pandemic.
- The final frame from this episode was revealed by mistake at the end of the premiere of "Who R Zoo?" in the UK and Ireland airing.
- List of diseases everyone caught by the end of the episode:
- Squidward: Grease Gout
- SpongeBob: Moldy Measles
- Mrs. Puff: Trash Trichinosis
- Patrick: Dust Bunny Bronchitis
- Pearl: Polyester Plague
- Mr. Krabs: A combination of all five
- Plankton: Clam Flu
- In the French dub, this episode is called "Le Crabe en Quarantaine," which translates to "The Crab in Quarantine."
- A clip from this episode was released in a promo that aired on Nickelodeon Australia & New Zealand on February 24, 2020.
- A clip from this episode was revealed in the video "Top 5 Moments: Patrick," released on Mundonick.com in Brazil on March 5, 2020, and in Mexico on March 9, 2020.
- A clip from this episode was released in "Top 5 Funniest Moments from New Episodes" video on official Nick Russia and Asia Facebook account on November 24, 2020. 
- This is the second medical-related episode of season 12. The first is "Hiccup Plague."
- This is the second appearance of the Health Inspector in season 12. The first is "Plankton's Old Chum."
- During one frame where Mrs. Puff catches Mr. Krabs in a garbage can, the latter's teeth colour turns transparent.
- In one frame, Mr. Krabs' blue shirt is missing and only its sleeves are visible.
- ^ https://twitter.com/VincentWaller72/status/1286760443311042560
- ^ https://twitter.com/VincentWaller72/status/1351562478585450496?s=20
- ^ Google archive of the episode page is from this date.
- ^ https://twitter.com/VincentWaller72/status/1142706996044587008
- ^ https://twitter.com/MancieRaines/status/1336801846996815873
- ^ https://twitter.com/VincentWaller72/status/1351562478585450496?s=20
- ^ https://www.twitter.com/VincentWaller72/status/1336460910144102400
- ^ https://mega.nz/file/wXpxEZxS#PNQSQhA3mxErOKSIZsC-zyULjpw2fjBc9Gi8K7tZGQg
- ^ https://www.youtube.com/watch?v=qDMgtChcWAM
- ^ https://www.youtube.com/watch?v=tnQ26V_iBF0
- ^ https://fb.watch/2sW0zdUo9p/
- ^ https://m.facebook.com/nickasia/videos/392007905316453/