Dexter's Laboratory (1996)

Adventure · Animation · Comedy

Dexter, a boy-genius with a secret laboratory, constantly battles his sister Dee Dee, who always gains access despite his best efforts to keep her out, as well as his arch-rival and neighbor, Mandark.

IMDb rating: 7.8 (58,577 votes)
Seasons: 4
Streaming (US): Tubi TV
Language: EN
Type: TV series

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Ratings refreshed Aug 19, 2026 · 4 seasons indexed

Cast

Seasons

Season 1 (1996)

7.45 avg 13 episodes 7.6 → 7.2 23 min avg

Season 1 episodes - IMDb ratings
#	Title	Rating	Votes
1	Deedeemensional/Dial M for Monkey: Magmanamus/Maternal Combat	7.6	346
2	Dexter Dodgeball/Dial M for Monkey: Rasslor/Dexter's Assistant	7.7	299
3	Dexter's Rival/Dial M for Monkey: Simion/Old Man Dexter	7.9	296
4	Double Trouble/Barbequor/Changes	7.3	237
5	Jurassic Pooch/Dial M for Monkey: Orgon Grindor/Dimwit Dexter	6.9	224
6	Dee Dee's Room/Dial M for Monkey: Huntor/The Big Sister	7.3	229
7	Star Spangled Sidekicks/The Justice Friends: TV Super Pals/Game Over	7.5	252
8	Babysitter Blues/The Justice Friends: Valhallen's Room/Dream Machine	7.4	224
9	Dollhouse Drama/The Justice Friends: Krunk's Date/The Big Cheese	7.9	277
10	Way of the Dee Dee/The Justice Friends: Say Uncle Sam/Tribe Called Girl	7.4	218
11	Spacecase/The Justice Friends: Ratman/Dexter's Debt	7.3	206
12	Dexter's Rival/The Justice Friends: Bee Where?/Mandarker	7.5	219
13	Inflata Dee Dee/The Justice Friends: Can't Nap/Monstory	7.2	209

Season 2 (1997)

7.29 avg 41 episodes 8.1 → 7.9 23 min avg

Season 2 episodes - IMDb ratings
#	Title	Rating	Votes
0	Rude Removal	8.1	379
1	Beard to Be Feared/Quackor the Fowl/Ant Pants	7.8	209
2	Mom and Jerry/Chubby Cheese/That Crazy Robot	6.9	188
3	D & DD/Hamhocks and Armlocks	7.5	189
4	Hunger Strikes/The Koos Is Loose/Morning Stretch	7.3	178
5	Dee Dee Locks and the Ness Monster/Backfire/Book 'Em	7.0	165
6	Sister's Got a Brand New Bag/Shoo, Shoe Gnomes/Lab of the Lost	7.1	167
7	Labels/Game Show/Fantastic Boyage	7.3	163
8	Filet of Soul/Golden Diskette	7.5	190
9	Snowdown/*Figure Not Included/Mock 5	7.8	203
10	Ewww That's Growth/Nuclear Confusion/Germ Warfare	7.2	163
11	A Hard Day's Day/Road Rash/Ocean Commotion	7.1	178
12	The Bus Boy/The Justice Friends: Things That Go Bonk in the Night/Ol' McDexter	7.4	172
13	Sassy Come Home/Photo Finish	7.3	167
14	Star Check Unconventional/Dexter Is Dirty/Ice Cream Scream	7.3	176
15	Decode of Honor/World's Greatest Mom/Ultrajerk 2000	7.3	166
16	Techno Turtle/Surprise!/Got Your Goat	7.1	165
17	Dee Dee Be Deep/911/Down in the Dumps	7.0	162
18	Unfortunate Cookie/The Muffin King	7.9	200
19	Picture Day/Now That's a Stretch/Dexter Detention	7.1	165
20	Don't Be a Baby/Peltra/G.I.R.L. Squad	7.0	163
21	Sports-a-Poppin'/Koos a la Goop a Goop/Project Dee Dee	6.9	167
22	Topped Off/Dee Dee's Tail/No Power Trip	6.9	166
23	Sister Mom/The Laughing	7.0	171
24	Dexter's Lab: A Story/Coupon for Craziness/Better Off Wet	7.2	174
25	Critical Gas/Let's Save the World You Jerk!/Average Joe	6.9	157
26	Rushmore Rumble/A Boy and His Bug/You Vegetabelieve It!	6.9	168
27	Aye Aye Eyes/Dee Dee and the Man	7.2	168
28	Old Flame/Don't Be a Hero/My Favorite Martian	7.3	158
29	Paper Route Bout/The Old Switcharooms/Trick or Treehouse	7.0	172
30	Quiet Riot/Accent You Hate/Catch of the Day	7.2	158
31	Dad Is Disturbed/Framed/That's Using Your Head	7.1	154
32	DiM/Just an Old Fashioned Lab Song.../Repairanoid	7.5	168
33	Sdrawkcab/The Continuum of Cartoon Fools/Sun, Surf, and Science	6.9	159
34	Big Bots/Gooey Aliens That Control Your Mind/Misplaced in Space	7.2	159
35	Dee Dee's Rival/Pslyghtly Psycho/Game for a Game	7.2	167
36	Blackfoot and Slim/Trapped with a Vengeance/The Parrot Trap	7.5	174
37	Dexter and Computress Get Mandark!/The Justice Friends: Pain in the Mouth/Dexter vs. Santa's Claws	7.3	215
38	Dyno-Might/LABretto	7.6	182
39	Last But Not Beast	8.2	229
40	London Calling	7.9	22

Season 3 (2001)

6.15 avg 13 episodes 6.1 → 6.1 23 min avg

Season 3 episodes - IMDb ratings
#	Title	Rating	Votes
1	Streaky Clean/A Dad Cartoon/Sole Brother	6.1	144
2	Mind Over Chatter/A Quakor Cartoon/Momdark	6.3	139
3	Copping an Aptitude/A Failed Lab Experiment/The Grand-Daddy of All Inventions	5.8	140
4	Poppa Wheely/A Mom Cartoon/The Mock Side of the Moon	6.3	130
5	If Memory Serves/A Mandark Cartoon/Tele Trauma	6.1	135
6	A Boy Named Sue/Lab on the Run	6.5	142
7	Dos Boot/A Dee Dee Cartoon/Would You Like That in the Can	6.2	134
8	That Magic Moment/A Silent Cartoon/Opposites Attract	6.3	129
9	Comic Relief/A Third Dad Cartoon/Robo Dexo 3000	6.0	128
10	Glove at First Sight/A Mom & Dad Cartoon/Smells Like Victory	6.3	128
11	Oh, Brother/Another Dad Cartoon/Bar Exam	5.9	131
12	Scare Tactics/A Mom Cartoon/My Dad vs. Your Dad	6.0	142
13	Jeepers, Creepers, Where Is Peepers?/Go, Dexter Family, Go!	6.1	139

Season 4 (2002)

6.25 avg 13 episodes 6.6 → 6.5 23 min avg

U-shaped

Season 4 episodes - IMDb ratings
#	Title	Rating	Votes
1	Beau Tie/Remember Me?/Over-Labbing	6.6	138
2	Sis-Tem Error/Bad Cable Manners/Dexter's Library	6.4	133
3	The Scrying Game/Monstrosi-Dee Dee/Dad Man Walking	5.9	134
4	Dexter's Little Dilemma/Faux Chapeau/D2	6.1	130
5	Head Band/Stuffed Animal House/Used Ink	6.4	129
6	School Girl Crushed/Chess Mom/Father Knows Least	6.3	128
7	Dexter the Barbarian/Tuber Time/Sore Eyes	6.1	132
8	Babe Sitter/Mountain Mandark/2Geniuses 2Gether 4Ever	6.1	134
9	Height Unseen/Bygone Errors/Folly Calls	6.0	132
10	Voice Over/Blonde Leading the Blonde/Comic Stripper	6.4	127
11	Tee Party/Dexter's Wacky Races	6.3	128
12	The Lab of Tomorrow/Chicken Scratch/Garage Sale	6.1	128
13	They Got Chops/Poetic Injustice/Comedy of Feathers	6.5	134

Dexter's Laboratory (1996)

Cast

Seasons

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