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Season 3

39 :03x01 - Lights! Camera! Danger!

Jimmy and the gang enter a script-writing competition, where the winning script gets turned into a movie. Jimmy wins and the director decides to Carl, Sheen, Libby and Cindy in the movie.
Guest Stars: Jim Meskimen as Quentin Smithee | Candi Milo as Nick | Phil LaMarr as Bolbi Stroganovsky | Tim Curry as Professor Calamitous
Director: Keith Alcorn
Writer: Steven Banks

40 :03x02 - The N Men

On their way back from playing golf on Mercury, Jimmy and the gang inherit superpowers after being exposed to the Van Patten radiation belt.
Guest Stars: Crystal Scales as Mrs. Folfax | Billy West as Sam
Director: Mike Gasaway
Writer: Gene Grillo

41 :03x03 - The Tomorrow Boys

Jimmy, Sheen, and Carl travel 15 years into the future, only to find that some things have gone wrong. Can they right the past to save their future?
Guest Stars: Graystar as Themselves
Songs: Graystar -- Wasting All This Time!

42 :03x04 - Fundemonium

After the car company Hugh works for decides they don't need his services anymore, the Neutrons are faced with the awful prospect of moving. To stay in Retroville, Hugh becomes a toy inventor, and the Nano-bots return again to wreak more havoc.
Guest Stars: Daran Norris as Nanobot 1 | Tom Kenny as Nanobot 2
Writer: Tom Sheppard
Songs: Outkast -- Hey Ya

43 :03x05 - Who's Your Mommy/Clash of the Cousins

Who's Your Mommy?
On a return visit to Planet Smangy with Jimmy and Sheen, Carl comes into contact with an alien life form which impregnates him.

Clash of the Cousins
Jimmy's Great Aunt Amanda is having a birthday party, but things go horribly wrong when Baby Eddie tries to destroy them all for Aunt Amanda's money!
Guest Stars: Mark DeCarlo as Baby Eddie

44 :03x06 - Stranded

A trip gone wrong ends up turning even worse when Jimmy and Cindy get into an argument that winds up getting them stranded together.
Guest Stars: Candi Milo as Nick
Writer: Jed Spingarn

45 :03x07 - Jimmy Goes to College

Jimmy becomes frustrated at school when his scientific lecture is disregarded in favor of making macaroni sculptures. So, when Dean Cain, head of Pamona University, offers him a chance to enroll in that college to help them win a science grant, Jimmy eagerly accepts. He soon finds, however, that college is a completely different world from elementary school ... a much more challenging one. And when it comes to jealousy of Jimmy's knowledge, Cindy (left behind at Lindbergh Elementary) doesn't hold a candle to new classmate.
Guest Stars: Graystar as College Students | Tom Kane as Dean Cain
Writer: Jed Spingarn

46 :03x08 - Incredible Shrinking Town

After being teased about being short, Jimmy accidentally shrinks the citizens of Retroville.
Guest Stars: Kevin Michael Richardson as Tee | Maurice LaMarche as Zix
Writer: Steven Banks

47 :03x09 - Crouching Jimmy, Hidden Sheen

A kung-fu warrior wants to be The Chosen One in the temple of Shangri-Llama, but Sheen holds that position, with his ability to put his leg behind his head. So, the warrior kidnaps Libby in order to fight with Sheen and claim the title of "The Chosen One" as his own.
Guest Stars: Michael Hagiwara as Mastor Hong / Ninja | James Sie as Yoo Yee / Elderly Monk / Ninja
Writer: Jed Spingarn

48 :03x10 - One of Us/Vanishing Act

One of Us
Everyone in town gets hypnotized by a TV show to act "happy." Jimmy and Cindy have to put a stop to Grandma Tater's show before it's too late!

Vanishing Act
Jimmy tries to become a magician to impress Betty, but something goes horribly wrong, and he ends up transporting the group into alternate universes.
Guest Stars: Corey Burton as The Great Spamdini | Edie McClurg as Grandma Taters | Kath Soucie as Betty Quinlan
Writer: Steven Banks

49 :03x11 - The Trouble with Clones

Evil Jimmy returns! Jimmy needs his evil clone to "be" him so he can up his invention output by staying in his lab while the clone goes to school and spends time with his friends and family, so he tries to make the clone a "Good Jimmy." Of course, things go wrong and Evil Jimmy wreaks havoc around town and creates a cloned Earth with a dark matter chip! Can Jimmy stop him before the real Earth disappears?
Guest Stars: Rob Paulsen as Evil Jimmy | Billy West as Sam | Candi Milo as Nick
Writer: Gene Grillo

50 :03x12 - Carl Wheezer: Boy Genius/The Evil Beneath

Carl Wheezer: Boy Genius
Carl asks Jimmy to help him pretend to be a genius, just for one day, in order to impress a girl names Elke. But Jimmy soon wishes he hadn't.

The Evil Beneath
Jimmy, Carl and Sheen set out to discover the mystery behind the Bahama Quadrangle. They are captured by a mad scientist (Dr. Sydney Moist) who wants to make them into slaves!
Guest Stars: Jim Cummings as Atila The Hun | Jeff Bennett as Announcer, Dr. Moist
Writer: Steven Banks

51 :03x13 - Who Framed Jimmy?/Flippy

Who Framed Jimmy?
Someone's stolen a lot of money ... and the evidence points to Jimmy! Jimmy gets sent to jail for a crime he didn't commit, and soon, Carl and Sheen join him for trying to bust him out of jail. Can they find the real thief before they're locked away for good?

Hugh wants to become a ventriloquist, so Jimmy decides to give him a hand. But his modifications may cause a big problem for his father.
Guest Stars: Joe Lala as Mr. Esteves | Jeff Bennett as Officer Tubbs | Rob Paulsen as Banjo-playing Kid | Mark DeCarlo as Flippy
Writer: Steven Banks

52 :03x14 - King of Mars

Eustace Strych is back, and he's still determined to humiliatingly defeat Jimmy. Now the race to find an energy source on Mars is on! Who will win? During the whole fiasco, Cindy tries to impress and get Jimmy's attention.
Guest Stars: Rob Paulsen as Eustace Strytch
Writer: Gene Grillo

53 :03x15 - El Magnifico/Best In Show

El Magnifico
Mr. Estevez wants to impress his son, so he asks for Jimmy's help.

Best In Show
Jimmy enters Goddard in a dog show. Goddard easily wins, but he is soon disqualified for being robotic ... so the canine runs away to let Jimmy get a real dog.
Guest Stars: Charlie Adler as Junkman | Joe Lala as Mr. Esteves | Edie McClurg as Grandma Taters
Writer: Steven Banks

54 :03x16 - My Big Fat Spy Wedding

Beautiful Gorgeous and Jet Fusion are getting married, but something doesn't seem right to Jimmy. He soon learns it's a ploy to get rid of him and Jet for good.
Guest Stars: Michael Clarke Duncan as Commader Baker | Wendie Malick as Beautiful Gorgeous | Christian Slater as Jet Fusion | Joe E. Elwood as Monkey | Rena Archer as Monkey | Keith Alcorn as Man With Red Shirt | John A. Davis as Man with Black Shirt | Tim Curry as Professor Calamitous
Writer: Steven Banks
Songs: Unknown -- I have the ring, Unknown -- We all can sing

55 :03x17 - League of Villains

King Goobot has gathered up a team of villains comprising of Grandma Taters, The Junkman, Beautiful Gorgeous, Baby Eddie, Professor Calamitous, The Space Bandits and Eustace Strych. Their mission is to get Jimmy Neutron.
Guest Stars: Kevin Michael Richardson as Tee | Wendie Malick as Beautiful Goregeous | Charlie Adler as Junkman | Jeff Bennett as Barbarino | Maurice LaMarche as Zix | Rob Paulsen as Eustace Strytch | S. Scott Bullock as King Goobot | Edie McClurg as Grandma Taters
Writer: Steven Banks

56 :03x18 - Jimmy Timmy Power Hour 2 - When Nerds Collide

Timmy Turner travels to Retroville to ask Cindy to a dance. Jimmy also decides to ask Cindy! So the two battle it off to see who Cindy chooses. Also Professor Calamitous robs the Retroville bank and starts reeking havoc in Dimsdale and Retroville. Will Jimmy and Timmy be able to stop fighting in time to stop Professor Calamitous before he destroys the world? And who will Cindy choose?
Guest Stars: Jeff Bennett as Dr. Moist | Daran Norris as Cosmo/ Mr. Turner/ Jorgen Von Strangle/ Anti-Cosmo | Tim Curry as Professor Calamitous | Chris Kirkpatrick as Chip Skylark | Jim Ward as Chet Ubetcha | Carlos Alazraqui as Denzel Crocker | Susan Blakeslee as Wanda/ Miss Turner/ Anti-Wanda | Tara Strong as Timmy Turner | Morgan Freeman as Himself

57 :03x19 - How to Sink a Sub/Lady Sings the News

How To Sink A Sub
Jimmy sends the teachers of Lindberg elementary away into space for a week. At first it's a blast for the students there but when Carl accidentally informs their parents they decide to take over the school.

Lady Sings The News
Jimmy, Carl and Sheen carry out a hilarious prank on the evening news. The next day Corky Shimazu comes to there school and gives them jobs on The Evening News. At first everything starts off okay but when Libby starts telling every one's secrets in her gossip segment, Da Word, they decide to come up with a plan to stop her before all of there secrets are revealed.
Guest Stars: Candi Milo as Nick | Joe Lala as Mr. Esteves | Debi Derryberry as Amber | Mark DeCarlo as Announcer | Rob Paulsen as Mr. Wheezer/Butch/Principal Willoughby | Billy West as Corky Shimazu/Kid/Sam | Frank Welker as Special Vocal Effects | Jim Belushi as Coach Gruber | Crystal Scales as Ike | Jeffrey Garcia as Director

58 :03x20 - Jimmy Timmy Power Hour 3 - Jerkinators

Jimmy and Timmy become crime fighting friends, with the combination of Jimmy's science and Timmy's magic they are unstoppable. There friends becomes so strong that it causes Jimmy to ignore his two best friends Sheen and Carl and it causes Timmy to ignore his two best friends Chester and Aj. They even ignore Cindy. The two then get tired of beating villains so they decide to create an ultimate villain so they can destroy.
Guest Stars: Tara Strong as Timmy Turner | Daran Norris as Cosmo/Mr. Turner | Susan Blakeslee as Wanda/Mrs. Turner | Billy West as Sam/ Corky Shimazu | Grey Griffin as Vicky | Carlos Alazraqui as Mayor/Chompy/Denzel Crocker | Rob Paulsen as Eustace Strytch | Jay Leno as Nega-Chin | Gary Leroi Gray as A.J. | Jason Marsden as Chester McBadbat | Joe Lala as Mr. Esteves | Keith Alcorn as Mr. DeCarlo
Classification: Animation
Genre: Children Cartoons | Children | Sci-Fi
Status: Canceled/Ended
Network: nickelodeon ( USA)
Runtime: 30 Minutes
Premiere: September 06, 2002
Ended: November 25, 2006
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