- SpongeBob SquarePants
- Dream SpongeBob
- Gary the Snail
- Dream Gary (Gary's dream) (debut)
- Dream Gary (Plankton's dream)
- Dream Mrs. Puff
- Emily Dickinson (debut) (mentioned)
- Man from Peru (debut) (mentioned)
- Patrick Star
- Dream Patrick
- Squidward Tentacles
- Dream Squidward
- King Fish (debut)
- Audience in Squidward's dream (debut)
- Sandy Cheeks
- Dream Sandy
- Dream Parakeet
- Ricky Marlin (debut) (on an album cover)
- Roughy Goulet (debut) (on an album cover)
- Pearl Krabs
- Dream Pearl
- Eugene H. Krabs
- Dream Mr. Krabs
- Moby Dollar (debut)
- King Neptune (mentioned)
- Sheldon J. Plankton
- Dream Plankton
- Karen Plankton (cameo, desktop form)
- Dream Incidental 93
- Dream Incidental 86
- Dream Incidental 40
- Dream Fred
- Dream Incidental 73
- Dream Incidental 37A
After settling for bed in the evening and sleeping, SpongeBob has a strange dream where he is driving a hot rod in a Krabby Patty-themed location and he has his driver's license, then crashes into a rock. However, Mrs. Puff appears and tears up SpongeBob's license, and he is then propelled out of his own dream. He appears as a small, glowing version of himself in the outside world, where he sees himself sleeping. SpongeBob realizes that he has no dream to go to, until he sees Gary's dream cloud. He then jumps in, frightening Gary.
In his dream, Gary has a humanoid body who can speak English and resides in a huge library. Gary tells SpongeBob some limericks before SpongeBob goes out of Gary's dream cloud and into Patrick's. Patrick's dream is completely empty, except for a kiddy ride that he is riding on and a door resembling that of SpongeBob's front door that leads out of the dream. SpongeBob explains to him that in a dream, he can do whatever he wants, which he demonstrates by changing size and creating a million copies of himself. Patrick says he's already satisfied, and SpongeBob goes out of Patrick's dream cloud. The ride then stops and Patrick takes out a quarter but drops it in a sewer grid.
Next, he goes into Squidward's dream, where Squidward is playing his clarinet for a king in a theater. SpongeBob distracts the king by telling him a limerick that Gary recited in his dream, and Squidward stops, mad at SpongeBob for invading his dream. The king growls at him for not playing. After this happens several times, Squidward becomes so angry that he snaps his clarinet, but SpongeBob saves him by turning into a clarinet. It produces no sound, and SpongeBob just sings horribly, which surprisingly everybody applauds at. A crowd then picks up SpongeBob while throwing Squidward into a fruit cart, wondering how he can make such music. He then transforms back into his normal form and runs out the exit doors at the back of the theater. Squidward is knocked into the fruit cart by the audience and the king while they chase SpongeBob as he exits the dream.
SpongeBob goes into Sandy's dream, where they are skydiving and have to land on a painted target. SpongeBob asks if it's "kind of dangerous," and Sandy says "Not as long as you got a big ol' parachute." SpongeBob misunderstands her twice (such perceiving "pair of shoes" and "parakeet"), and while trying to explain to him, Sandy fails to open her own parachute in time and lands in a truck filled with clam manure. SpongeBob falls out of Sandy's dream and says to himself "All right, that's it. No more messing with people's dreams."
However, he then goes to what he thinks is Mr. Krabs' dream, but actually is Pearl's dream, where she is having a tea party with her stuffed animals in a very childish and girlish setting. After realizing this, he immediately goes to Mr. Krabs' dream, where he's fishing for money. Mr. Krabs instructs SpongeBob to pull out his money net from his back pocket, which turns out to be Mr. Krabs' wallet. SpongeBob and Mr. Krabs manage to catch Moby dollar, but it escapes and Mr. Krabs shoots SpongeBob out of the dream via a harpoon gun tied to SpongeBob.
He is launched directly into Plankton's dream. Plankton, in his dream, is a giant monster and can shoot lasers from his eye, and is destroying the city. SpongeBob realizes that it isn't a dream, but a nightmare. Once Gary is about to be crushed by Plankton, SpongeBob pricks his foot by turning into a pushpin, and Plankton deflates. The angry Bikini Bottomites close in on him and Plankton tells them that he guesses he has some explaining to do, but gets his punishment by being stepped on by everyone else. Plankton then wakes up in terror.
SpongeBob then goes back to his own dream cloud, where the angry faces of everyone whose dreams he entered appear around him. When he wakes up, everyone (except Patrick) is in his house complaining that he's messed up their dreams and tells him to stay out. Just before the episode ends, Patrick then appears out of nowhere and asks everyone if they have a quarter, and they stare at Patrick in confusion.
- SpongeBob entering people's dreams but unknowingly ruining them.
|( ‣ ) Associated production music|
|( • ) Original music|
|( ◦ ) SpongeBob music|
‣ Island Romance - George de Fretes, Jan Rap [title card]
‣ Vibe Link (a) - Richard Myhill [SpongeBob falls asleep]
‣ Happy End - Gerhard Trede [start of SpongeBob's dream]
‣ Custom Cruiser - The Mel-Tones [SpongeBob driving]
‣ Bring Back [#18] - Lars-Luis Linek [Mrs. Puff takes away SpongeBob's license]
‣ Orchestral Effect (f) - Dick Stephen Walter [SpongeBob enters Gary's dream]
‣ Vibe Link (b) - Richard Myhill ["Gary?"]
‣ Mozart Concerto 21 In C, 2nd Mvt. - Jonathan Starkey, Wolfgang Mozart [Emily Dickinson poem]
‣ The Foot of the Hill - Miloslav Verner [Man from Peru]
‣ Mozart Concerto 21 In C, 2nd Mvt. - Jonathan Starkey, Wolfgang Mozart [SpongeBob leaves]
‣ Twinkle Twinkle Little Star (b) - Brian Gulland, Richard Harvey [Patrick asleep]
‣ Dombummel - Gerhard Trede [Patrick's dream]
• Squid Clarinet - Brad Carow [Squidward playing clarinet]
‣ Royal Entrance - Dick Stephen Walter ["Why do you stop playing, Wolfgang Amadeus Tentacles?"]
• Squid Clarinet - Brad Carow [Squidward continues playing clarinet]
‣ Majesty - Dick Stephen Walter ["Hey! I have not instructed you to stop!"]
‣ Dramatic Cue (d) - Ronald Hanmer [Squidward breaks his clarinet]
‣ Dämonen U. Urgewalten - Gerhard Trede ["I came here to hear beautiful music!"/King glares down at Squidward]
‣ Sleeping Beauty - David Farnon ["Why have you stopped playing that wonderful music?"]
‣ Mersey Mania [#26] - Ian Henry Marsh, Phil Pickett [audience chases SpongeBob]
‣ Dreaming of Paradise (b) - Helene C.E. Muddiman [Sandy asleep]
‣ Metal Boost - Mac Prindy [skydiving]
‣ Hawaiian Link (b) - Richard Myhill ["Hey! Mr. Krabs!"]
‣ In the Cradle (a) - Dick Stephen Walter [Pearl's dream]
‣ The Jovial Buccaneers [#32] - John Fox [Mr. Krabs' dream]
‣ Invincible Armada [#32.02] - Gregor F. Narholz [chasing Krabs' wallet]
‣ The Rake Hornpipe - Robert Alexander White ["This'll make a great fish story, eh, Mr. Krabs?"]
‣ Hawaiian Link (a) - Richard Myhill [Plankton's dream]
‣ Muscovite Rebellion - David Arnold, Paul Hart [giant Plankton zapping everyone]
‣ On the Beach - Kapono Beamer [SpongeBob returns to his own dream]
‣ Killer Birds [#36] - Gregor F. Narholz [SpongeBob surrounded by floating heads]
‣ On the Beach - Kapono Beamer [ending]
- This episode is available on the Tide and Seek, Complete 1st Season, Karate Choppers, First 100 Episodes, The SpongeBob SquarePants Collection, Let's go anywhere with a time machine!, Rock Bottom, The Sponge Of Terror, The Complete First Season, The Ultimate SpongeBob Box Set, The SpongeBob SquarePants Collection, Whale of a Birthday(Greek only), The SpongeBob SquarePants 8 Season DVD Collection, Sponge Crazy, Karate Cutting, Orange Collection, SpongeBob SquarePants Vol. 2, From the Beginning, Part 1, The First & Second Seasons, Movies & TV Collection, and The Best 200 Episodes Ever DVDs.
- This episode is also available on the Tide and Seek and Sponge-a-Rama VHS tapes.
- "Sleepy Time" was ranked #70 during the Best Day Ever event from November 9–10, 2006.
- Since the episode's production number is 141, this is the last episode of season 1 in production order, and thus the last episode to be produced in traditional cels before the series transition to digital ink-and-paint. Cels for this show were used until 1999, and digital ink-and-paint was introduced in 2000.
- Counting the cameo of Karen's desktop form, this is the first episode in which all ten main characters appear.
- The dreams that were seen in this episode:
- SpongeBob's dream: SpongeBob is driving a racecar through a world filled with Krabby Patties. He gets his driving license, but Mrs. Puff appears and rips it up, destroying his confidence.
- Gary's dream: Gary is the humanoid keeper of a vast library.
- Patrick's dream: Patrick is riding a kiddy ride in an empty white void.
- Squidward's dream: Squidward, as Wolfgang Amadeus Tentacles, performs at a clarinet recital for a king.
- Sandy's dream: Sandy is skydiving from an airplane to land on a red target.
- Pearl's dream: Pearl is having a tea party with stuffed animals in her fantasy world.
- Mr. Krabs' dream: Mr. Krabs is at sea during a storm, trying to catch a giant dollar bill named "Moby Dollar."
- Plankton's dream: Plankton is a giant causing destruction in Bikini Bottom.
- SpongeBob's second dream: When SpongeBob tucks himself into his bed in his dream bubble, he is surrounded by all of his angry friends' heads.
- Patrick is the only one who doesn't get angry at SpongeBob for entering his dream.
- "My leg!:" In Plankton's dream, just as he is destroying a building.
- In the Polish dub, the episode's title is "Sennik," which translates to "The Dream Book."
- In the Norwegian dub, the episode title is "Besøk av drømmer," which translates to "Visit of Dreams."
- In the Croatian dub, the episode title is "Slatki Snovi," which translates to "Sweet Dreams."
- This episode heavily uses the concepts of lucid dreaming, astral projection, and out of body experience.
- Gary says "Beware of your wandering eye, you little poriferan" in his dream. The scientific name for a sponge is the phylum Porifera.
- This and its sister episode were written by exactly the same people. The same applies to the storyboard directors, storyboard artists, animation director, and creative director.
- This means that this episode has the same opening credits as its sister.
- In the video games Battle for Bikini Bottom and Battle for Bikini Bottom: Rehydrated, there is a stage based on this episode: SpongeBob's Dream, where it takes place in the dream world and allows SpongeBob to visit the dreams of other characters. Also, one of the robots that appear in the level is called Sleepy-Time, which is behind the Krusty Krab.
- The video game Creature from the Krusty Krab is very similar to this episode. The game's third act, in which SpongeBob and Patrick battle a giant Plankton, is directly based on Plankton's dream in this episode.
- In this episode, it is revealed on SpongeBob's and Mr. Krabs' driver's licenses when they were born.
- SpongeBob's driver's license:
- Expires: 12-14-03
- Address: 124 Conch St. Bikini Bottom
- Class: S
- Sex: M
- Hair: Yellow
- Eyes: Blue
- HT: 0-04
- WT: 1oz
- DOB: 07-14-86
- Mr. Krabs' driver's license:
- Expires: 11-30-02
- Address: 3541 Anchor Way Bikini Bottom
- Class: S
- Sex: M
- Hair N/A
- Eyes: Green
- HT: 0-07
- WT: 5
- DOB: 11-30-42
- SpongeBob's driver's license:
- According to a picture of a workprint of the episode posted by storyboard artist Adam Paloian on his Twitter account, SpongeBob's license was originally going to look a bit different, with a different picture of SpongeBob and a different signature signed "S. Squarepants" instead of "SpongeBob SquarePants."
- This is the first episode SpongeBob is seen with a driver's license.
- This episode's opening is similar to its sister episode's opening, "Suds," as both episodes start with SpongeBob having a dream.
- There is a PowerTouch book based on this episode.
- Gary and Pearl were annoyed at SpongeBob, but SpongeBob didn't do anything in their dreams that caused trouble in any way, although she might've been told by Mr. Krabs about SpongeBob ruining his dream, which could be the reason why she was angry at him.
- In this episode, Plankton wakes up at an office desk. The desk reappears in "Truth or Square," Creature from the Krusty Krab, and "Plankton's Intern." According to the background artwork, the computer on the desk is "desktop" Karen.
- SpongeBob's reaction is never shown to his friends admonishing him for ruining their dreams.
- This is the first episode to premiere in the 2000's decade.
- SpongeBob tells Gary, "Curiosity salted the snail," a reference to the old saying, "Curiosity killed the cat," as sea snails are portrayed as the cats of the sea.
- Moby Dollar is a parody of Moby Dick.
- The name that Squidward has in his dream, Wolfgang Amadeus Tentacles, is a parody of Wolfgang Amadeus Mozart.
- Also, the Andante from his Piano Concerto No. 21 is playing in the background while SpongeBob is in Gary's dream.
- Sandy crashing into a truck of clam manure is a reference to the running gag from the Back to the Future movies where Biff Tannen crashes into a truck of manure.
- In one scene, when Gary and SpongeBob are walking along with the library, a book is shown close up. On the cover, the title reads Of Snails and Men, a parody of John Steinbeck's novel Of Mice and Men.
- In addition, Gary references and quotes Emily Dickinson, one of history's most famous poets.
- In Pearl's dream, Roughy Goulet and Ricky Marlin, parodies of singers Robert Goulet and Ricky Martin can be seen on album covers.
- Gary's poem is a reference to "The Old Man of Peru," by Edward Lear.
- When Gary puts SpongeBob's socks on his eyes, the stripes on top switch to blue when they're usually red, and the stripes on the bottom switch to red when they're usually blue.
- When SpongeBob is outside Squidward's house, the window is shown open, but there is another window frame on the wall.
- When SpongeBob comes to Pearl's dream, he enters at the left part of the house, but when he comes out, he exits from the middle of the house.
- When everyone is standing around SpongeBob's bed at the end of the episode, at first Pearl's nightcap is missing. In the next shot, it is there. The same applies to her hair.
- When SpongeBob turns into a skyscraper, his eyes are paler than normal.
- When SpongeBob's friends lash out for him ruining their dreams, they are at the end of his bed in a line. When viewed from the side, however, they aren't standing on either side.
- In the Filipino dub, Dream Gary quoting Emily Dickinson's quote and the king mentioning Wolfgang Amadeus Tentacles is left in the original English audio.
- Also, in this dub, when SpongeBob says "I can make a million of me!" in Patrick's dream the audio echoes, but when SpongeBob is asking "Huh, huh?", his voice doesn't echo.