- Gunther Fitz (debut)
- Mrs. Puff
- SpongeBob SquarePants
- Sergeant Sam Roderick (single appearance)(apparent death)
- Incidental 158
- Incidental 102
- Incidental 103
- Incidental 106
- Incidental 152
- Incidental 151
- Incidental 41
- French narrator
- Incidental 85
- Old Man Jenkins
- Patrick Star (2 cameos)
The episode begins at Mrs. Puff's Boating School, Mr. Fitz, the superintendent, is talking to Mrs. Puff about renewing her teaching certificate, but then informs her of the high record of failing students. However, SpongeBob is the only student who has ever failed her class, but has done so 1,258,056 times. Mrs. Puff is told to show Mr. Fitz everything she has taught SpongeBob, and within seconds, he fails yet another driving test by bashing in a boatmobile. Mr. Fitz fires Mrs. Puff, much to her delight of not having to deal with SpongeBob anymore. A new boating instructor named Sergeant Roderick comes in and takes over the school.
Sergeant Roderick is a viciously hard-drill instructor, who immediately throws out one student for talking and another one for eating. All of the other students run away, except for SpongeBob, who is now his only student. The new boating instructor has set up a difficult course, which he trains SpongeBob to crawl, walk, run, and eventually drive through while blindfolded. Despite SpongeBob's unprofessional driving skills, he surprisingly masters this.
During the time of his final exam, which Mr. Fitz personally comes to watch, SpongeBob realizes that he can only drive while blindfolded, and proceeds to take the exam with the same disastrous results. Roderick nearly dies attempting to stop his boat from destroying Bikini Bottom, and Mr. Fitz realizes that SpongeBob is "unteachable" and rehires Mrs. Puff.
The next day, SpongeBob goes to Mrs. Puff's class and gives her a "welcome back" card, then proceeding to apologize for his destruction. Though Mrs. Puff tearfully tells him that she got her teaching degree back, and SpongeBob's file was destroyed in the fire, so it was as if he never failed her boating school. SpongeBob leaves, promising it will not take him a "million times" to pass school, leaving a devastated Mrs. Puff to cry, as the episode ends.
|( ‣ ) Associated production music|
|( • ) Original music|
|( ◦ ) SpongeBob music|
‣ Horlepiep - Jan Rap [Title card]
‣ Furtive Footsteps - Paddy Kingsland [The opening]
‣ Dramatic Impact (1) - Ivor Slaney [SpongeBob is revealed to have failed his boating test 1,258,056 times.]
‣ Furtive Footsteps - Paddy Kingsland ["You don't understand. SpongeBob is unteachable."]
• Earl's Revenge - Sage Guyton, Jeremy Wakefield [SpongeBob appears.]
‣ The Achterhoek Dances - Jan Rap [The driving test begins.]
• Vibe Q Sting - Nicolas Carr ["Start the engine?"]
• Starting the Boat - Nicolas Carr ["What do I do now?"]
• Steel Licks 10 - Jeremy Wakefield [Mrs. Puff inflates.]
‣ Hawaiian Cocktail - Richard Myhill [Mrs. Puff gets fired.]
‣ Moloka'i Nui A - Kapono Beamer [Mrs. Puff laughs.]
‣ King Kong Coming - Gregor F. Narholz [Loud footsteps are heard.]
‣ Arnold is Back 1 - Gregor F. Narholz [The new driving instructor is introduced.]
‣ Drummers and Fifers - Roger Roger ["No one's ever failed my class... that's lived through it."]
‣ Dramatic Impact (2) - Ivor Slaney [The instructor throws a student out.]
‣ Finger of Fear - Fredric Bayco ["Would anyone care for a bon-bon?"]
‣ Search Party 3 [#52] - Harry Bluestone, Emil Cadkin [A student eats a bon-bon.]
‣ Dramatic Cue (A) - Ronald Hanmer ["No eating in my classroom!"]
‣ Dramatic Cue (E) - Ronald Hanmer ["Looks like you're the man... sponge."]
‣ Deadline - Sam Spence [Obstacle course]
‣ Pell-Mell - Sam Spence [SpongeBob crawls.]
‣ Astronauts March - Sam Spence ["I'm ashamed of you, cadet."]
‣ Big Ed's March - Sam Spence [Training montage]
• ? ["Every good boater needs to know his vehicle inside and out."]
• Lap Steel - Nicolas Carr [boat taken apart]
• Steel Sting - Jeremy Wakefield ["I might need a couple of minutes."]
‣ Tympup A - Sammy Burdson, John Charles Fiddy ["Jumpin' jellyfish!"]
‣ Proud Fanfare - David Farnon [Rocket]
‣ Running Bass - Sam Spence ["Watch for pedestrians. Check mirrors."]
‣ Dangerous C - Mladen Franko [SpongeBob crashes into pedestrians.]
‣ Hawaiian Cocktail - Richard Myhill ["Why don't you ask the shattered remains of this pedestrian... How you did?!"]
‣ Up She Rises - Sam Spence [SpongeBob drives blindfolded.]
‣ Bonnie Blue Gal - Sam Spence [SpongeBob's final exam]
• Grass Skirt Chase - Sage Guyton, Jeremy Wakefield ["Drive, boy! Drive!"]
• Sponge Monger - Sage Guyton, Jeremy Wakefield [SpongeBob drives wildly.]
‣ Satin Slipper - Raymond Beaver [Nat makes a cake.]
• Sponge Monger - Sage Guyton, Jeremy Wakefield [The boat takes the cake ahead.]
‣ Sleepy Time - Dick Stephen Walter [Mrs. Puff paints a picture.]
• Sponge Monger - Sage Guyton, Jeremy Wakefield [SpongeBob destroys the city.]
• Steel Licks 1 - Jeremy Wakefield [Mrs. Puff is rehired.]
‣ The Achterhoek Dances - Jan Rap [The ending]
- This episode is available on the Karate Island, Season 4 Volume 1, The Ultimate Box Set, First 100 Episodes, Double Feature Volume 1, SpongeBob SquarePants Vol. 6, Roller Cowards, Double DVD Fun, 2-Season TV Pack, Favorite Episodes Volume 2, The Ultimate SpongeBob Box Set, The SpongeBob SquarePants Collection, The SpongeBob SquarePants 8 Season DVD Collection, Complete Fourth Season, From the Beginning, Pt.2, Driving Bikini Bottom Crazy!, The Third & Fourth Seasons, and The Best 200 Episodes Ever DVDs.
- "Mrs. Puff, You're Fired" was ranked #82 during the Best Day Ever event from November 9–10, 2006.
- "Mrs. Puff, You're Fired" was ranked #85 during the SpongeBob's Top 100 event in the UK and Ireland from June 4-8, 2012.
- The black paint used to take out Mrs. Puff's name from the boating school sign can be seen dripping briefly before the next class begins.
- This episode includes the footage from "No Weenies Allowed" where SpongeBob is flung out of the water and back in again.
- This episode marks another instance in which SpongeBob proves he can drive competently. Previously, in "Boating School," he gets instructions from Patrick's walkie-talkie, and is just about to pass the test. However, when Mrs. Puff tells him his method is a form of cheating, SpongeBob drives out of control and fails once again.
- SpongeBob would have to unscrew more than two little bolts to remove the brake. Even then, after removing all the gears, springs, and other mechanisms, the brakes would still be somewhat operable with the emergency/parking brake.
- Even though the new teacher's name is not spoken in this episode, his name is revealed in the credits as "Sergeant Roderick."
- Mr. Fitz's first name is also revealed in the credits as "Gunther."
- It is never revealed if Sargent Roderick either alive or dead after he failed on stop the boat.
- This is the second episode in which SpongeBob says, "Hey, a nickel!" The first is "Krab Borg."
- This episode marks the final usage of the track "Arnold Is Back," until it returned 11 years later in "Spin the Bottle."
- This episode premiered on the same day as the 2006 Kids' Choice Awards.
- In the Polish dub, this episode's title is "Pani Puff wylatuje z pracy," which translates to "Mrs. Puff is Out of Work." 
- This is Mrs Puff’s only major role in Season 4.
- In this episode, the beginning of “Grass Skirt Chase” plays, only to transition into “Sponge Monger”. This also happens in “Good Ol' Whatshisname”.
- When Sergeant Sam Roderick says, "What are you suppose to be learning in my class?," SpongeBob's legs are missing. Also, his hand is missing and appears as it moves.
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