Appearances

Plankton was first created by Stephen Hillenburg as a potential villain for the show. However, he later feared that Plankton's stories would get repetitive and predictable. During the production of season one, Hillenburg demoted Plankton from a main character to a minor one; he insisted that Plankton would work better as a one-time guest star.

However, Doug Lawrence loved the character. He summarized Plankton's origins in 2015, saying that he "was only supposed to be in one or two episodes, but I was a writer on the show and I really liked this character."[1] Lawrence wrote episode ideas for Plankton and passed them to Hillenburg.[1] From then on, Plankton began to appear more often. Lawrence's most notable contribution was giving a personality to Plankton's "waterproof computer," named Karen after Stephen Hillenburg's wife. He decided that Plankton and Karen should be an inseparable duo, with Karen as the brains of the operation, always supplying Plankton with evil plans.

Since Plankton's "reinvention" by Lawrence, he and Karen have appeared in many episodes. They were both officially promoted to main characters in the credits of the 2004 film and have been part of the main cast ever since. Plankton has also appeared in various video games.

Episodes

Image # Episode Role in episode
Season 1
Plankton! 174.jpg
3b
"Plankton!" (trga) Major
Culture Shock 103.png
10a
"Culture Shock" (trga) Minor
F.U.N 096.png
10b
"F.U.N." (trga) Major
Sleepy Time 134a.png
15a
"Sleepy Time" (trga) Supporting
Valentine's Day 013.png
16a
"Valentine's Day" (trga) Non-speaking cameo
Walking Small 139.png
18b
"Walking Small" (trga) Major
Season 2
Imitation Krabs 110.png
24b
"Imitation Krabs" (trga) Major
N/A
27b
"Life of Crime" (trga) Mentioned
Christmas Who 174.png
28
"Christmas Who?" (trga) Cameo
Welcome to the Chum Bucket 104.png
34a
"Welcome to the Chum Bucket" (trga) Major
Band Geeks 172.png
35b
"Band Geeks" (trga) Supporting
The Fry Cook Games 087.png
39b
"The Fry Cook Games" (trga) Major
Season 3
The Algae's Always Greener 061.png
41a
"The Algae's Always Greener" (trga) Major
Mermaid Man and Barnacle Boy IV 108.jpg
45a
"Mermaid Man and Barnacle Boy IV" (trga) Cameo
Snowball Effect 031.png
46a
"Snowball Effect" (trga) Cameo
Krusty Krab Training Video 154.png
50b
"Krusty Krab Training Video" (trga) Supporting
Party Pooper Pants 195.png
51
"Party Pooper Pants" (trga) Supporting
Plankton's Army 049.png
58b
"Plankton's Army" (trga) Major
The Sponge Who Could Fly 261.png
59
"The Sponge Who Could Fly" (trga) Minor
SpongeBob Meets the Strangler 160.png
60a
"SpongeBob Meets the Strangler" (trga) Cameo
Season 4
Fear of a Krabby Patty 072.png
61a
"Fear of a Krabby Patty" (trga) Major
Krabs vs. Plankton 112.png
62b
"Krabs vs. Plankton" (trga) Major
Planktonamor.jpg
66
"Dunces and Dragons" (trga) Major, medieval ancestor appears instead
Enemy In-Law 199.png
67a
"Enemy In-Law" (trga) Major
Mermaid Man & Barnacle Boy VI The Motion Picture 110.png
67b
"Mermaid Man & Barnacle Boy VI: The Motion Picture" (trga) Minor
Patrick SmartPants 062.png
68a
"Patrick SmartPants" (trga) Cameo
Wishing You Well 189.png
72b
"Wishing You Well" (trga) Supporting
New Leaf 188.png
73a
"New Leaf" (trga) Major
Best Frenemies 161.png
78b
"Best Frenemies" (trga) Major
Season 5
Friend or Foe 371.png
81
"Friend or Foe" (trga) Major
Spy Buddies 230.jpg
84a
"Spy Buddies" (trga) Major
Krabs à la Mode 098.png
85b
"Krabs à la Mode" (trga) Major
Bucket Sweet Bucket 018.png
86b
"Bucket Sweet Bucket" (trga) Major
Goo Goo Gas 145.png
91a
"Goo Goo Gas" (trga) Major
Atlantis SquarePantis 698.png
92
"Atlantis SquarePantis" (trga) Major
Mermaid Man vs. SpongeBob 034.png
94b
"Mermaid Man vs. SpongeBob" (trga) Major
20,000 Patties Under the Sea 063.png
97a
"20,000 Patties Under the Sea" (trga) Major
Banned in Bikini Bottom 093.png
100a
"Banned in Bikini Bottom" (trga) Major
Stanley S. SquarePants 200.png
100b
"Stanley S. SquarePants" (trga) Cameo
Season 6
Krabby Road 016.png
101b
"Krabby Road" (trga) Major
Spongicus 091.png
103a
"Spongicus" (trga) Major
Patty Caper 071.png
108a
"Patty Caper" (trga) Minor
Plankton's Regular 022.jpg
108b
"Plankton's Regular" (trga) Major
The Krabby Kronicle 125.png
109b
"The Krabby Kronicle" (trga) Minor
Komputer Overload 047.jpg
118b
"Komputer Overload" (trga) Major
Chum Bucket Supreme 024.png
122a
"Chum Bucket Supreme" (trga) Major
Single Cell Anniversary 145.png
122b
"Single Cell Anniversary" (trga) Major
Truth or Square 092.png
123-124
"Truth or Square" (trga) Major
Chum Caverns 050.jpg
125b
"Chum Caverns" (trga) Major
Season 7
Tentacle-Vision 148.png
127a
"Tentacle-Vision" (trga) Minor
Someone's in the Kitchen with Sandy 126.jpg
129a
"Someone's in the Kitchen with Sandy" (trga) Major
The Inside Job 050.png
129b
"The Inside Job" (trga) Major
Greasy Buffoons 131.png
130a
"Greasy Buffoons" (trga) Major
SpongeBob's Last Stand 313.png
134
"SpongeBob's Last Stand" (trga) Major
One Coarse Meal 124.png
137a
"One Coarse Meal" (trga) Major
The Play's the Thing 192.png
138a
"The Play's the Thing" (trga) Non-speaking cameo
Rodeo Daze 142.jpg
138b
"Rodeo Daze" (trga) Supporting
Gramma's Secret Recipe 081.jpg
139a
"Gramma's Secret Recipe" (trga) Major
Welcome to the Bikini Bottom Triangle 190.png
140b
"Welcome to the Bikini Bottom Triangle" (trga) Minor
The Main Drain 204.jpg
141b
"The Main Drain" (trga) Supporting
The Great Patty Caper 084.png
143
"The Great Patty Caper" (trga) Major
That Sinking Feeling 180.png
144a
"That Sinking Feeling" (trga) Cameo
Buried in Time 199.png
145a
"Buried in Time" (trga) Supporting
Shellback Shenanigans 038.png
147b
"Shellback Shenanigans" (trga) Major
Perfect Chemistry 126.jpg
152b
"Perfect Chemistry" (trga) Major
Season 8
The Other Patty 077.png
153b
"The Other Patty" (trga) Major
Drive Thru 173.png
154a
"Drive Thru" (trga) Minor
Frozen Face-Off 016.png
156
"Frozen Face-Off" (trga) Major
Squidward's School for Grown-Ups 027.png
157a
"Squidward's School for Grown-Ups" (trga) Cameo
Sweet and Sour Squid 027.jpg
158a
"Sweet and Sour Squid" (trga) Major
A SquarePants Family Vacation 015.jpg
159
"A SquarePants Family Vacation" (trga) Cameo
Walking the Plankton 058.jpg
160b
"Walking the Plankton" (trga) Major
Plankton's Good Eye 070.jpg
163b
"Plankton's Good Eye" (trga) Major
The Krabby Patty That Ate Bikini Bottom 123.jpg
167a
"The Krabby Patty That Ate Bikini Bottom" (trga) Minor
Fiasco! 101.png
168b
"Fiasco!" (trga) Major
Free Samples 008.jpg
170a
"Free Samples" (trga) Major
Karen 2.0 133.png
171a
"Karen 2.0" (trga) Major
For Here or to Go 188.jpg
174b
"For Here or to Go" (trga) Major
It's a SpongeBob Christmas! 179.png
175
"It's a SpongeBob Christmas!" (trga) Major
Super Evil Aquatic Villain Team Up is Go! 174.jpg
176a
"Super Evil Aquatic Villain Team Up is Go!" (trga) Major
Chum Fricassee 040.jpg
176b
"Chum Fricassee" (trga) Major
The Good Krabby Name 069.jpg
177a
"The Good Krabby Name" (trga) Cameo
Move It or Lose It 008.png
177b
"Move It or Lose It" (trga) Major
Hello Bikini Bottom! 397.png
178
"Hello Bikini Bottom!" (trga) Cameo
Season 9
Squirrel Record 061.png
179b
"Squirrel Record" (trga) Minor
Eek, an Urchin! 138.png
183a
"Eek, an Urchin!" (trga) Major
Jailbreak! 117.png
184a
"Jailbreak!" (trga) Major
Evil Spatula 200.png
184b
"Evil Spatula" (trga) Major
It Came from Goo Lagoon 084.png
185
"It Came from Goo Lagoon" (trga) Major
Plankton's Pet 044.png
186b
"Plankton's Pet" (trga) Major
Company Picnic 181.png
192a
"Company Picnic" (trga) Major
Married to Money 044.png
196b
"Married to Money" (trga) Major
CopyBob DittoPants 152.png
198b
"CopyBob DittoPants" (trga) Major
Lame and Fortune 095.png
199b
"Lame and Fortune" (trga) Major
Goodbye, Krabby Patty 226.png
200
"Goodbye, Krabby Patty?" (trga) Minor
Pineapple Invasion 002.png
203a
"Pineapple Invasion" (trga) Major
Salsa Imbecilicus 039.png
203b
"Salsa Imbecilicus" (trga) Major
Mutiny on the Krusty 062b.png
204a
"Mutiny on the Krusty" (trga) Non-speaking cameo
Season 10
Mimic Madness 044.png
207a
"Mimic Madness" (trga) Supporting
House Worming 077.png
207b
"House Worming" (trga) Minor
Plankton Gets the Boot 051.png
209b
"Plankton Gets the Boot" (trga) Major
Burst Your Bubble 082.png
210b
"Burst Your Bubble" (trga) Supporting
Plankton Retires 037.png
211a
"Plankton Retires" (trga) Major
The Incredible Shrinking Sponge 146.png
212a
"The Incredible Shrinking Sponge" (trga) Minor
N/A
215a
"Feral Friends" (trga) Deleted scene[2]
Season 11
Spot Returns 016.png
217a
"Spot Returns" (trga) Major
Spin the Bottle 007.png
218a
"Spin the Bottle" (trga) Major
The Legend of Boo-Kini Bottom 114.png
220
"The Legend of Boo-Kini Bottom" (trga) Supporting
No Pictures Please 153.png
221a
"No Pictures Please" (trga) Supporting
Krabby Patty Creature Feature 137.png
222a
"Krabby Patty Creature Feature" (trga) Supporting
Teacher's Pests 099.png
222b
"Teacher's Pests" (trga) Major
N/A
228a
"Fun-Sized Friends" (trga) Mentioned
Grandmum's The Word 035.png
228b
"Grandmum's the Word" (trga) Major
Bottle Burglars 043.png
230b
"Bottle Burglars" (trga) Major
Shopping List 195.png
232b
"Shopping List" (trga) Major
Patnocchio 073.png
234a
"Patnocchio" (trga) Major
Plankton Paranoia 122.png
235a
"Plankton Paranoia" (trga) Major
Call the Cops 014.png
236a
"Call the Cops" (trga) Major
Surf N' Turf 042.png
236b
"Surf N' Turf" (trga) Minor
Appointment TV 117.png
238a
"Appointment TV" (trga) Supporting
Karen's Virus 016.png
238b
"Karen's Virus" (trga) Major
The Grill is Gone 127.png
239a
"The Grill is Gone" (trga) Minor
Girls' Night Out 083.png
240b
"Girls' Night Out" (trga) Supporting
Season 12
Gary & Spot 042.png
242b
"Gary & Spot" (trga) Minor
The Krusty Slammer 133.png
244a
"The Krusty Slammer" (trga) Major
King Plankton 043.png
245b
"King Plankton" (trga) Major
Plankton's Old Chum 180.png
246a
"Plankton's Old Chum" (trga) Major
The Krusty Bucket 043.png
248a
"The Krusty Bucket" (trga) Major
Sandy's Nutty Nieces 083.png
249a
"Sandy's Nutty Nieces" (trga) Likeness only
Karen's Baby 034.png
250b
"Karen's Baby" (trga) Major
Senior Discount 191.png
251b
"Senior Discount" (trga) Minor
SpongeBob's Big Birthday Blowout 447.png
254-255
"SpongeBob's Big Birthday Blowout" (trga) Supporting
Handemonium 111.png
257a
"Handemonium" (trga) Major
The Ghost of Plankton 018.pngThe Ghost of Plankton 040.png
259a
"The Ghost of Plankton" (trga) Major
My Two Krabses 087.png
259b
"My Two Krabses" (trga) Minor
InShot 20200723 210924581.jpg
261b
"Hiccup Plague" (trga) Minor
The Hankering 127.png
262b
"The Hankering" (trga) Supporting
Who R Zoo 163.png
263a
"Who R Zoo?" (trga) Minor
Screenshot 20200708-152921.jpeg
263b
"Kwarantined Krab" (trga) Minor
Vlcsnap-2020-07-02-10h03m05s494.png
264a
"Plankton's Intern" (trga) Major
Vlcsnap-2020-07-29-19h11m06s528.png
267b
"Dream Hoppers" (trga) Cameo in Mr. Krabs' dream (non-speaking)
Season 13
A Place for Pets 096.png
268a
"A Place for Pets" (trga) Minor
Lockdown for Love 005.png
268b
"Lockdown for Love" (trga) Major

Shorts

Image # Episode Role in episode
PHH9.png
"Plankton's Holiday Hits" (trga) Major
Plankton sleeping with a floater.jpg
"Can't Swim" (trga) Supporting
Remodeling004.jpg
"Remodeling" (trga) Supporting
Loop dee Loop 04.png
"Loop dee Loop" (trga) Minor
Plankton Pays 017.png
"Plankton Pays" (trga) Major
SpongeBob's Legendary Dance Party 06.png
"SpongeBob's Legendary Dance Party" (trga) Minor
Plankton's Color Nullifier 022.png
"Plankton's Color Nullifier" (trga) Major

Movies

Image # Episode Role in episode
The SpongeBob SquarePants Movie 066.pngThe SpongeBob SquarePants Movie 386.png
F1
"The SpongeBob SquarePants Movie" (trga) Major
The SpongeBob Movie Sponge Out of Water 454.pngThe SpongeBob Movie Sponge Out of Water 789.png
F2
"The SpongeBob Movie: Sponge Out of Water" (trga) Major
Image1101.png
F3
"The SpongeBob Movie: Sponge on the Run" (trga) Major

Miscellaneous

References

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