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Crime Sheen Investigation
Titlecard Crime Sheen Investigation.jpg

Episode 11B
Season 1
Airdate November 30, 2002
Invention Neutroscope
Previous Safety First
Next Patrick the Snowman

"Crime Sheen Investigation" is an episode in The Adventures of Jimmy Neutron: Boy Genius.


Sheen is horrified to find one of his Ultra Lords has gone missing and asks Jimmy to help. It is up to Jimmy to be the Sherlock Holmes of Retroville and find the action figure. The suspects are Cindy, Judy, a squirrel, and Nick.


Sheen is walking through the park with an ice cream heading back to his Ultra Lord action figure under a big oak tree, where he finds it is missing. He searches for it but is unable to find it, leaving him devastated.

In Jimmy's lab, Jimmy is testing his latest invention on Carl, the Ultra Shock Dance Teacher 8000, which teaches you to dance with electric shocks. As he turns it on to the Mambo sequence, Sheen runs in screaming for him. Carl takes Sheen by the hand and the two start to dance, but Sheen lets go and tells Jimmy and Carl that his favorite Ultra Lord has been stolen. Jimmy asks Sheen to tell him what happened, and Sheen explains that he went to the park with Ultra Lord to play. The ice cream truck came, and as he was getting his ice cream, someone came and stole it. Sheen desperately pleas for Jimmy's help to find it, and he agrees because it will give him the chance to pin his mind against the criminal element. All through the conversation, Carl was still dancing.

Jimmy dresses up as Sherlock Holmes, and makes Carl be his Watson with a bowler hat, meaning Carl will be writing down the clues. Jimmy uses his Neutroscrope to see the heat of all the lifeforms that passed by that spot between 11:27 and 11:32 (the time Sheen was gone). Goddard identifies the biomasses which are, Cindy and Humphrey, Judy, a squirrel, and Nick. They rule out the squirrel, and question the rest. Sheen automatically believes Judy did it, but then takes Nick and Cindy into consideration. Carl starts asking the squirrels questions about the crime but is called by Jimmy and leaves.

They first question Cindy. Carl is looking at a squirrel when Jimmy asks for evidence. From their evidence they establish the motive of Cindy is that Sheen humiliated Cindy in front of the entire class by flicking a scab on the belly of her shirt. She tries to get it off by sticking her belly out and rubbing her belly. She says that Sheen is gross, but she didn't do it, but when they put her on a lie detector and ask her about her dog, she was lying, and admitted that she tried to get Humphrey to eat the Ultra Lord, but he spat it back out. Jimmy believes her but to be sure says they will X-ray her clothes, but she just hits him and knocks him out.

After he wakes up, they go to Jimmy's house to question his mother. Jimmy asks Carl to make a note that his mother is dusting the front lawn, but Carl is distracted by a squirrel. While he is questioning her, she asks why he is dressed like Sherlock Holmes, but he ignores her. As he interrogates her, she reminds him that court room style interrogations mean chores for a week, but he grabs her hand and scans it and finds traces of the same plastic that Sheen's Ultra Lord is made of, and she admits to trying to throw it out, but it was dirty that she couldn't even pick it up, and she ran home to get her rubber gloves, but Hugh wouldn't let her have them. They don't believe her because there is no reason for his dad to use them, but then Hugh comes outside wearing them on his head explaining that he is Cocky the Rooster Man.

They go to ask Nick questions. Carl tells them that Nick is trying to get a new styling mousse, but it's $53. Sheen said that coincidentally, that the was the price of his action figure and Nick said he should steal it. When Nick denies saying that, Sheen says he might as well have and Jimmy says he needs a lock of his hair, but Nick throws them in a dumpster. Luckily, Jimmy got some of Nick's hair, but it does not match the mousse. When Jimmy asks for Carl's notes, he hesitates and doesn't hand them over. When Jimmy gets them off him, all they are are drawings of squirrels. Carl says he is a bad Watson, but Jimmy remembers Sherlock Holmes once said that when all the possibilities are eliminated, whatever remains must be the truth.

They head to the park and look in the squirrel den in the oak tree to find they have Ultra Lord. They seem to believe he is their god and are using him as a nut cracker. Sheen goes crazy and fights the squirrels, who then attack him. Jimmy and Carl leave proud of themselves. Carl asks if Sheen will ever get it back and Jimmy tells that it is a mystery that even he can't solve.


Sheen: (enraged at what the squirrels are doing to Ultra Lord) They're using Ultra Lord as a nutcracker! Give me my action figure you stupid squirrel! Where’s your respect for Ultra Lord!
Carl: You think he’ll ever get it back?
Jimmy: That my dear Carl, is a mystery even I can’t solve.

Sheen: (shaking Jimmy) You've gotta help me, Jimmy! If you don't, I'll have to ask complete idiots to help me and you know how unreliable they are!

Carl: (as Jimmy is tugging on his notebook to see his notes) Yeah, about the notes, Jimmy, uh, they're actually...
Jimmy: (flips through Carl's notebook only to see drawings of squirrels) Squirrel, squirrel, squirrel, squirrel. More squirrels? Carl, these notes are completely useless!
Carl: (stammering) B-b-b-but Jimmy, you should have seen them. They were so cute and cuddly, and-and-and-and... I'M A BAD WATSON!


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  • Crime Sheen Investigation comes from the TV show CSI: Crime Scene Investigation.
  • This is the second episode where Cindy slapped Jimmy, the first episode was I Dream of Jimmy.
  • This is the first time the Ultra Shock Dance Teacher 8000 is used, the second is Crouching Jimmy, Hidden Sheen.
  • This is also the first Sheen-based episode.
  • Libby only appears in the first shot of Cindy's flashback.
  • The costumes that Jimmy and Carl are wearing are very similar to what Sherlock Holmes and Dr. Watson wear.
  • This is the last episode to air in 2002.
  • The squirrels stealing Ultra Lord could be a reference to Ultralord vs. the Squirrels
  • The license plate Humphrey barfs up has a license plate number "Kay 10". This could be a reference to Humphrey being a canine (K9) and one number up from nine is a ten (so Kay 10).


  • After Ultra Lord went missing, his throne was still left with Sheen. Despite this, after he is found, he is sitting on his throne. Maybe the squirrels took it when Sheen left the park. 
  • Judy is found to have plastic residue on her hands matching that of Sheen's Ultra Lord despite confessing that she refused to touch it without her rubber gloves and never returned to the park to dispose of it. 

The Adventures of Jimmy Neutron: Boy Genius Season 1 episodes
When Pants Attack | Normal Boy | Birth of a Salesman | Brobot | The Big Pinch | Granny Baby | Time is Money | Raise the Oozy Scab | I Dream of Jimmy | Jimmy on Ice | Battle of the Band | See Jimmy Run | Trading Faces | The Phantom of Retroland | My Son, the Hamster | Hall Monster | Hypno-Birthday To You | Krunch Time | Substitute Creature | Safety First | Crime Sheen Investigation | Journey to the Center of Carl | Aaughh!! Wilderness!! | Party at Neutron's | Ultra Sheen | Broadcast Blues | Professor Calamitous, I Presume | The Eggpire Strikes Back | Maximum Hugh | Sleepless in Retroville | Make Room for Daddy-O | Beach Party Mummy