- French Narrator
- Patchy the Pirate
- Potty the Parrot
- Jellyfish (in drawings)
- Dotty the Patchysaurus (debut)
- Choir (debut)
- Cavemen (debut)
- Cavey (debut)
- SpongeBob SquarePants (2 cameos)
- Eugene H. Krabs (cameo)
- Ammonite (cameo)
- Dorudon (debut)
- Prehistoric bug
- SpongeGar (debut)
- Prehistoric Gary (debut)
- Squog (debut)
- Patar (debut)
- Barbershop Quartet (debut)
- Albert Einstein (debut)
- Primitive Jellyfish (cameo)
- Prehistoric Krabs (debut)
- Patchy's mom (mentioned)
- X-29488 (debut)
- Creature in Squog's painting
- Primitive Sponge (cameo)
- Primitive Star (cameo)
- Squidward Tentacles (cameo)
- SpongeTron (cameo)
- T. rex (debut)
The French narrator introduces another SpongeBob SquarePants special, hosted from Encino, California as it was 100 million years ago. From his cave-house, Patchy the Pirate, in a caveman costume, is introducing prehistoric times and talking about how great they were. However, Potty, in a futuristic robot costume, appears and says that prehistoric times were "lame" and the future is "where it's at."
They begin arguing over whether SpongeBob himself likes prehistory or the future better. While working at the Krusty Krab, SpongeBob feels a disturbance and tells Mr. Krabs that "I've got the strangest feeling that somewhere a pirate and parrot are arguing about me. And, the parrot is winning." As Patchy and Potty continue to argue, Patchy begins the episode.
The cartoon features prehistoric ancestors of SpongeBob, Squidward, and Patrick, named "SpongeGar," "Squog," and "Patar," respectively. SpongeGar, who is sleeping in his pineapple-shaped cave, is awakened by a distant herd of monstrous purple creatures, who produce a sound identical to that of SpongeBob's alarm clock that knocks the rock on SpongeGar. SpongeGar wakes up and takes his version of Gary, who is bigger than the prehistoric pineapple itself, out for a walk, and the large sea snail leaves a slime trail all over Squog's front yard. Squog comes out with one of his two clubs to complain to SpongeGar, but slips on the slime trail, sliding into Patar's rock, awakening its occupant, and eventually crashing back into his own house. SpongeGar and Patar begin to play, and SpongeGar uses a hollow log to blow a bubble. It then starts raining, and eventually lightning strikes the log, setting it on fire.
The three cavemen experiment with it, burning themselves in the process. Very soon, SpongeGar realizes that it can be used to cook food. The three begin cooking various items with it. These include flowers, the top of a mushroom, a kelp reed, a wood stick (Patar eats it), a prehistoric (non-anthropomorphic and smaller) ancestors of Eugene H. Krabs, seaweed flowers that look similar to corn on the cob, a green plant that looks like spaghetti, rocks that take the form of popcorn, and a Krabby Patty made of sand.
Over the commercial break, Patchy and Potty continue to fight, now keeping score between the future and the past. Patchy then brings in a real live caveman, but Potty brings in a futuristic robot who begins repeatedly shooting the caveman with lasers.
At the end of the day, SpongeGar, Patar, and Squog are full from eating and say goodbye to each other as they head over to their homes. Suddenly, SpongeGar, Patar and Squog stop walking and they turn around, realizing that the fire is still out there. The three of them start fighting over who will keep the fire. They continue fighting until it starts raining again and puts the fire out. SpongeGar and Patar apologize to each other for fighting, but Squog blames them for putting it out and attempts to hit them over the head. Before he can do so, however, lightning strikes him and SpongeGar and Patar cook marshmallows over his charred body.
After the episode ends, Patchy is shown sitting outside his cave, apparently having lost to Potty. However, Potty comes outside and invites him back in, where Cavey the Caveman and the Robot Android Cyborg DX-294888 do a rap called "When Worlds Collide."
Patchy began to have a change of heart about "loving" the future. The song montage features scenes from SpongeBob B.C. and "SB-129." The episode ends with Potty giving Patchy a "gift from the prehistoric times," that being a Tyrannosaurus Rex, which begins chasing him. Patchy says goodbye to the viewers, ending the episode while being eaten by the Tyrannosaurus Rex.
SpongeGar, Patar, and Squog speak in a primitive language similar to English. Many words and sounds are taken from or based on English words/sounds.
|Banooga Ready!||I'm ready!|
|Tabanga do?||it belongs to you, not me!|
|Wait a minute||wait a minute|
|Sutaka jakasa!||why you little!|
The French Narrator saying, "Stay tuned to SpongeBob B.C.," Patchy getting hit with a big rock, and the French Narrator saying, "They discovered fire. How long are they gonna take to mess it up? Let's see" are all cut from The Complete 3rd Season and The First 100 Episodes DVDs due to there being no commercials. These are still intact on the SpongeBob Goes Prehistoric DVD and VHS. It can also be found on the Nick Picks Volume 1 DVD.
|( ‣ ) Associated production music|
|( • ) Original music|
|( ◦ ) SpongeBob music|
‣ A Pirate's Life for Me (a) - Ron Goodwin [Opening music]
‣ Monster Bug (a) - Gregor F. Narholz ["...100 million years ago!"]
‣ 'Er Indoors - Johnny Hawksworth [Patchy riding a fake dinosaur/Patchy talks about prehistoric times]
‣ Lonely Stranger - Laurie Johnson [meanwhile at the Krusty Krab]
‣ 'Er Indoors - Johnny Hawksworth [Patchy and Potty arguing]
‣ Pulse of Africa - Robin Hogarth ["Ugh" title card]
‣ Moon Walk - John Fox [primordial sea]
‣ Hawaii Jive Ho - David Jones [SpongeGar wakes up]
‣ African Xylophone [#97] - Mark Nolan ["Wait a minute..."]
‣ Cucu Chama - David Bradnum [Squog complaining about slime trail]
‣ Natives Bulletin - Jonny Teupen [Patar eats slime off Squog]
‣ African Xylophone [#97] - Mark Nolan [Squog yells at Patar.]
‣ Vibe Sting - Nicolas Carr ["Huh?"]
‣ Sangoma (d) - Richard Siluma [SpongeGar and Patar hitting themselves]
‣ Nyala - David Bradnum [rain]
‣ Cucu Chama - David Bradnum [thunder/lightning]
‣ Mystery Run [#98.03] - Geoff Bastow, Jim Harbourg [gong]
‣ Pulse of the Earth - Mauricio Venegas-Astorga [fire]
‣ Bongo Crazy [#43] - Martyn David, Alan Bell, Roger Stephen Dexter [SpongeGar and Patar scream in pain]
‣ Pulse of the Earth - Mauricio Venegas-Astorga [Patrick eats his hand]
‣ Glissando Up - Eric Allen [Squog hits Patar]
‣ Alpha to Omega (b) - Dave Hewson [SpongeGar stares at the stick.]
‣ ? [choir.]
‣ Proclamation (a) - Gregor F. Narholz [SpongeGar gets an idea/Squog eats the plant.]
‣ African Flute - Friedel Berlipp [roasting things over the fire]
‣ Bell Hop (a) - John Shakespeare ["I told you prehistoric times were fun!"/Robot attacks Cavey/"Welcome back to SpongeBob SquarePants B.C. Sounds like things have gone from bad to worse for Patchy. Let's watch."]
‣ African Flute - Friedel Berlipp [roasting more food]
‣ African Percussion (g) - Robin Hogarth [SpongeGar and Squog hitting each other]
‣ Pulse of Africa - Robin Hogarth [they fight over the log]
‣ Bare Foot - Robin Hogarth [Squog struck by lightning]
‣ The Dreadnought Tea Clipper (b) - Tim Laycock, Robert Alexander White ["Now I know how Squidward feels."]
• When Worlds Collide - Theo Mondle, Paul Tibbitt, Kent Osborne
‣ Monster Bug (a) - Gregor F. Narholz [dinosaur]
‣ The Girl I Left Behind Me - Brian Peters [ending]
‣ B.C. Strut - Steve Belfer [closing credits]
- This episode is available on the SpongeBob Goes Prehistoric DVD and VHS, and on the Complete 3rd Season, SpongeBob SquarePants Vol. 5, Nick Picks Volume 1, Triple Pack 4, Big Hits: Volume 2, Nick Picks Box-Set (Vol, 1-3), Nickelodeon Double Feature, First 100 Episodes, The Third & Fourth Seasons, The Best 200 Episodes Ever and Complete Third Season DVDs.
- "Ugh" was ranked #16 during the Best Day Ever event on November 9–10, 2006.
- The episode was ranked #48 in the "Top 100 Greatest Nicktoon Episodes" as part of "Superstuffed Nicktoons Weekend".
- Although this episode premiered on Friday, March 5, 2004, it was made in 2002 according to the credits.
- This episode aired in Germany on Thursday, September 18, 2003, before it aired in the United States.
- This episode aired in Lithuania in December 2003, before it aired in the United States.
- This episode premiered in Canada on Friday, May 14, 2004.
- This episode and "F.U.N." tie for the shortest episode title in the series, with only three letters.
- However, in terms of characters, this is the shortest title, with three characters in total.
- This is the first episode where SpongeBob appears as a cameo. He also only has one line.
- This is the first episode to use stock footage from previous episodes.
- This is the second double-length episode of season 3. The first is "Party Pooper Pants," and the third is "The Sponge Who Could Fly."
- In the French dub, according to the French narrator, the episode takes place 100 millenia ago, but this is orders of magnitude inaccurate in light of the coexistence of various creatures seen in the episode (see approximate timeline below).
- Squog says "Wait a minute" at one point, the only full English sentence spoken by any of the Cavemen.
- Scenes from "SB-129" are seen during the "When Worlds Collide" sequence.
- Primitive Sponge and Primitive Star drooling.
- Squidward saying "Future!"
- SpongeTron saying "I am SpongeTron"
- The scene with the Primitive Jellyfish first appeared in the episode "SB-129."
- One of the foods SpongeGar cooks is a Krabby Patty replica made of sand.
- SpongeGar's marshmallow-like plant returns to his stick when he teaches Patar how to properly cook the food. He most likely got a new one when Squog and Patar were heating their food.
- The caveman whom Patchy found and thawed out is played by Bill Fagerbakke, who voices Patrick. Incidentally, Potty's robot is voiced by Tom Kenny, the portrayer of SpongeBob and Patchy.
- On DirecTV and Amazon Prime, this episode is called "SpongeBob B.C. (Before Comedy)."
- In the original airing and on the DVDs, the captions where the characters are speaking caveman-like are listed as "speaking gibberish" or "gibberish" in the dialogue.
- Example: SpongeGar's line "Banooga Ready!" (which means "I'm ready!") is written as "(speaking gibberish)."
- The opening credits after the title card are unique. This episode marks the third time this has happened, the first two being "SB-129" and "Krusty Krab Training Video."
- SpongeGar, Squog, and Patar discover fire and prove that it is able to exist underwater for the rest of the show's timeline.
- This episode, along with "Party Pooper Pants" and "The Paper," is infamous for rarely being aired on Nickelodeon.
- The music used in the introduction of SpongeGar, Patar, and Squog is exactly the same music used for the title card of "Rock Bottom."
- Excluding the narrator, Patchy, Potty, Cavey, Potty's Robot, the actual SpongeBob and Mr. Krabs during the "Meanwhile" time card, none of the dialogue in this episode episode was edited in the Korean version.
- If you look carefully when Patchy is being tickled by the T-Rex, it looks like he's on a floor.
- Patchy has brown eyes throughout the episode, but when his eyes bulge out of his head, they are blue.
- This episode marks the second time an interjection is used as an episode title. The first is in "Arrgh!"
- Patchy's caveman cave house is in the Cretaceous period, while the past part of the cartoon part of the episode is in the Jurassic period.
- The prehistoric part takes place sometime between 150,800 and 148,500 millennia ago because ammonites existed 400,000-66,000 millennia ago, sponges started to exist sometime between 635,000 and 541,000 millennia ago, starfish started to exist sometime between 541,000 and 485,400 millennia ago, pterodactyls existed 150,800–148,500 millennia ago, crabs started to exist sometime between 201,300 and 145,000 millennia ago, octopuses started to exist 323,200 millennia ago, snails started to exist sometime between 497,000 millennia ago and 485,400 millennia ago, and jellyfish (shown on SpongeGar's cave wall) started to exist 505,000 millennia ago.
- The activities of SpongeGar, Patar, and Squog paint an (inconsitent) parallel with those of late archaic human species and early modern humans. It is thought that homo ergaster might have had a language, homo erectus discovered fire, and early modern humans domesticated animals, in that order. However, SpongeGar has a pet, and speaks a language with the other two, by the time all three discover fire onscreen. However, this discovery was made underwater, so the "late" discovery of fire (still around 150 million years earlier than homo erectus, according to the above timeline) can be excused.
- The first time one of Squidward's ancestors is seen, while the second time Patrick and SpongeBob's ancestors are shown.
- This episode reveals that SpongeBob, Squidward, and Patrick's ancestors were neighbors just like their descendants.
- This is another episode that indicated the trio were fated to know each other, the next being "Pest of the West."
- The atonal singing of the barbershop quartet is a reference to the piece "Requiem for Soprano, Mezzo Soprano, Two Mixed Choirs, and Orchestra" by György Ligeti, which was used in the film, 2001: A Space Odyssey, whenever the monolith appeared.
- The scene in which SpongeGar realizes that he can use a stick as a tool to take a piece of coral out of the fire pays direct homage to the Dawn of Man sequence from the film 2001: A Space Odyssey, a famous scene in which a group of apes learn to use a bone as both a tool and weapon. In both cases, the narrative has portrayed these stories without the use of conventional dialogue (using nonsensical cave-ish speech in Ugh and using ape noises in 2001).
- The music is also a direct homage, with a modernistic wailing piece used while SpongeGar makes his discovery, and music similar to the classical piece "Also Sprach Zarathustra" by Richard Strauss played after SpongeGar's discovery, mirroring the use of those two pieces of music in 2001.
- B.C. standing for "Before Comedy" is a parody of the Dionysiusian term "Before Christ".
- In the scene where Squog tells SpongeGar that he is a genius and not an idiot, a speech bubble of Albert Einstein's face is shown. This is a reference to the fact that Einstein was genius.
- The black and white stock footage of cavemen was taken from the 1914 silent film Brute Force, which is considered to be the first live-action dinosaur film.
- The French narrator refers to SpongeGar as "SpongeBob" near the end of the first part of the episode.
- When Patar punctures his lip, the stick is thick, but when SpongeGar stomps on a little crab, takes the stick out of Patar's lip, impales a small crab, and gives it to him, the stick is thin.
- When Prehistoric Gary makes a snail trail on Squog's rocks, it is on the one closest to his house, but when Squog looks out the window, it is on the third one from his house.
- Squog doesn't have a door in his house until he takes the fire to it.
- Patchy's hook is shown on his left hand when he tells the audience that it was easier to hit a baseball in the Prehistoric times and tries to create fire, while in other scenes, it is on his right hand.
- Also, in the next frame, after he introduces himself, he does not have his hook.
- While SpongeGar sniffs his first charred flower on a stick, the roots are seen over his beard where the root parts over his beard are red.
- When Squog chooses which club to use, he puts the one he didn't want on the right. When it shows a close-up view, it is moved to the left.
- When SpongeGar falls from the rope, it is implied that he falls into a pile of leaves. However, in both the shot where SpongeGar gets trapped and the one where he sees Patar and Squog running after the log, there are no leaves around.
- During the visual of an ancient drawing of SpongeBob and Patrick squeezing up and down while "When Worlds Collide" plays, at one point during the animation loop, SpongeBob is missing the line that is supposed to resemble his pants.
- Patar putting salt on items and then eating them except Squog's tentacle, who hits Patar on the head to stop him from gnawing his tentacle.
- Potty eating popcorn and saying, "This is great" whenever bad things happen.
- Squog slipping on Gary's slime trail and crashing at a house.
- Cavey trying to throw a giant rock at the X-29488, and in the 2nd attempt, it bonked Patchy's head, and he fell down.