''[[http://www.fanfiction.net/s/3560875/1/Nights_in_the_Big_City Nights In The Big City]]'' is a ''KimPossible'' fan fiction written by Mr. Wizard.

Sergeant Sasha Barkin, of Go City's finest, gets a call one night to deal with two kids in a warehouse. What starts out as a typical call goes awry when it becomes clear that neither of them are from [[AlternateUniverse her reality]], and one of them is grievously injured. What follows is part mystery, part noir, and part political thriller as Kim and Ron, now lost in another universe, struggle to get back to their own. Attracting the interest of powerful foreign governments, they navigate drug rings, kidnapping attempts and unfamiliar politics while living with the police officer who first found them.

!!This story provides examples of:
* ActionGirl: faithful to the source material, you get a whole cast of 'em.
* AlternateUniverse: with an AlternateHistory to match.
* ARealManIsAKiller: played with.
* BadassFamily: You get to [[WhamEpisode Chapter Thirty-two]] and... yeah.
* [[BadassGrandpa Badass Grandparents]]: Several, some shown explicitly and others implied. Some are [[RetiredBadass retired]], others not so much.
* BadDreams: Sasha, after she kills a man. Leads to [[DrowningMySorrows drowning her sorrows]].
* [[spoiler:CavalryBetrayal: Sasha, the Gurkhas are not here to help you.]]
* CrypticBackgroundReference: In this universe, [[AmericanCivilWar Robert E. Lee]] fought on the Union side and became the 17th President of the United States, the cars run on ethanol, the Pope is a woman and so is God. Details like this are casually thrown out now and then, sometimes because [[{{Foreshadowing}} they will be significant later]], but mostly to [[WorldBuilding create a world]] that's living and working beyond the story.
** [[spoiler: Adolph Hitler]] was apparently "Vienna's most celebrated set designer."
* DarkerAndEdgier: The story is suffused with a [[FilmNoir noir]] tone. There is a rather high level of violence, accompanied by realistic consequences up to and including characters being KilledOffForReal.
* DeadpanSnarker: The ''narration,'' as befits a story told by any incarnation of Shego.
* DidYouJustHaveSex: Both Sasha and Reneca pick up each other's "happy walk".
* DomesticAbuser: Bobby Johnson, boyfriend of the alternative universe Kim.
* TheEmpire: A few, including TheBritishEmpire and many other European great powers.
* FairCop: Sasha and her partner, Reneca Cramer.
* GoodBadGirl: Sasha is a reformed example.
* GoodPeopleHaveGoodSex: and a lot of it, at that.
* GreyAndGrayMorality: in the tradition of noir fiction. Even Kim and Ron end up sort of [[ALighterShadeOfGray off-white]].
* HairTriggerTemper: While she's got a better handle on it than Shego, Sasha still has her moments.
* HappilyMarried: Sasha and Steve Barkin.
* InSpiteOfANail: Pretty much every ''KimPossible'' character has a double, though their lives (and world history) are often radically different.
* IntimatePsychotherapy: [[IncrediblyLamePun coupled]] with GladToBeAliveSex, in an unusually well-done way.
* JacobMarleyWarning: Sasha is called in on a child-neglect case: the mother died and the father [[DespairEventHorizon fell completely to pieces]] and started [[DrowningMySorrows drinking heavily]]. Afterwards, she becomes more cautious in her investigation and makes Steve promise to hold himself together if anything does happen to her.
* KnowledgeBroker: Sasha's brother Mike (alt-Mego) has a finger is every pie and knows the dirt on everyone in Go City.
* LawOfInverseFertility: Sasha and Steve, in the {{backstory}}.
* LighterAndSofter: Not [[DarkerAndEdgier the story]], but some of the doubles of villains from the show are positively nice people in this universe.
* LittleMissBadass: Kim, of course. Everyone who encounters her at the GCPD is amazed that such a cute slip of a girl can also be a physics-defying fighting machine with the constitution of an Olympic athlete.
* LoadsAndLoadsOfCharacters: Oh, yes. Almost every ''KimPossible'' character appears, as well as several original ones to round out the Go City police force, the town, and the various families. You get to know most of them quite well.
* TheMafiya: A more rounded portrayal than usual.
* MamaBear: Sasha to her four year old daughter, Marsha.
* [[spoiler:NarniaTime: Kim and Ron spend months in the AlternateUniverse, and return home to find that only a few hours have passed.]]
* ObstructiveBureaucrat: Alt-Sensei, expecting the {{Imperial Japan}}ese government to order Kim and Ron eliminated once the reports make their way to the top of the bureaucracy, uses every [[PolitenessJudo protocol maneuver]] he can (such as channeling communications through people hostile to the Yamanouchi school and thus inclined to sit on his reports as long as possible) to delay matters while warning them to make their escape ASAP.
* OfficerAndAGentleman: Montgomery Fiske, Fourth Lord of Niagara. [[spoiler: It doesn't stop him from being rather [[AffablyEvil affably evil]], though.]]
* OutWithABang: [[spoiler: Avar, courtesy of the Rani.]]
* PapaWolf: Steve Barkin gets his moments, too. So do a few others.
* ShameIfSomethingHappened: The bad guys [[spoiler:threaten Sasha by hacking into her computer and editing her daughter's image out of all her photos]].
* TheyWouldCutYouUp: The head of the OSS (alt-Nana), warns Kim and Ron that factions in the US government are proposing extreme measures to extract the secrets of interdimensional travel, and that she'll only be able to block them for so long....
* TitledAfterTheSong: several of the chapter titles.
* TheUnfettered: Chapter Thirty-six is called "Shego With a Badge."
* TranquilFury: Kim, after reading her alternate self's diary.
* UnusualEuphemism: "Bounce" and "high note".
* VisionsOfAnotherSelf: This universe's Kim doesn't believe she could ever be as extraordinary as her BadassNormal TeenSuperspy alternate self; canon-Kim just thinks she was dodged a bullet in not meeting alt-Kim's abusive boyfriend.
* WhamEpisode: Chapter Thirty-two, when the bad guys [[spoiler: come after Sasha's daughter.]]
* [[WhereTheHellIsSpringfield Where The Heck Is Middleton?]] This fic places Middleton in Michigan, which helps give the impression that Go City is [[NoCommunitiesWereHarmed Chicago with the serial numbers filed off]].
* WickedCultured: [[spoiler: Lord Montgomery Fiske.]]


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